this seriously helped me to figure this out!! i was so confused when i was trying to do my problems but watching this helped me figure it out so easily!
Thank you for explaining this clearly. My textbook was confusing. I was stuck on this for a week and have a test in two days. Eureka.. the light bulb went off finally!
If only all teachers could leave their egos out of the classroom and be this concise and clear, math would be so much more approachable and not scary. Best mixture problem video on the internet! Thank you!!
No need to use decimals. You can use integers and get the same answer. Eliminates possible misplacement of a decimal point. 10x + (35)(80) = 30(x + 80) gives the same answer of 20 liters.
In East Asia, 5th graders are taught to solve this type of problems with arithmetic. This one is a ratio problem. Algebra is NOT needed. In America, that kind of math teaching is totally missing in elementary schools.
hehehe, I have gone through Differential equation in the best school that the bay area, CA has. And It took me two minutes to realize this was a simple question. Beautifly explained. Thank you for your dedication.
I used a combination of the fraction conversion and the Gaussian Elimination method to solve this problem. First, I converted each decimal into fractions... x/10+4/5(35)=3y/10 _eq1_ x+80=y _eq2_ 10[x/10+28=3y/10] (Multiply eq. 1 by 10) x+280=3y x+80=y (New set of equations) x-3y=-280 x-y= -80 (rearrange each equation in ax+by=c form) -(x-3y=-280) x-y= -80 (multiply eq 1 by -1) -x+3y= 280 x-y = -80 (new set of equations) 2y= 200 (Elimination method) y= 100 liters (35% solution) x+80= 100 x= 20 liters(10% solution)
Thank you Sir. This was really helpful. I missed this class at school back in 8th grade and now that m preparing for university entry tests I needed to revise it. Surprised by how simply you explained it. I can finally do these problems. Yay!
As an Algebra teacher with 30+ years of experience, let me begin by apologizing for my colleague. It's never good form when someone else in the know looks at you and thinks "small animals have been known to gnaw off their legs..."
Thanks for the video! This was a difficult concept for me to really grasp. The only thing I've done differently was I got rid of those decimals by multiplying each of them by 100 before actually solving the equation.
So usefulll@omg, check this, I had the same one as yours, I really had a hard time to solve this kind of exercises. How many liters of 60% acid solution must be mixed with a 75% acid solution to get 20 liters of a 72% solution?? Answer : 4 liters
That's actually a really easy problem to do. I think you're just trying to bait them into doing your homework for you. Your problem isn't any different than his, just remember you're adding 100% alcohol solution to your 15%.
The problem with mixture equations (for me) is that if you move that table around just a little bit, I'm lost again. I just tried to solve a mixture problem where the instead of x+80 (adding to a solution) it was x-80. I can calculate the equation but I still can't visualize the problem.
Yo thanks for the example! The only thing I would change is that where you put (x + 80)L, you could have just put y instead. Thanks for the solution problem example again!!!!!!!!!
Hello sir, Please, solve the following problem using algebra: Beaker A and B are filled with acid and water in the ratio 2:5 and 7:3 respectively.In what ratio,mixture A and B to be mixed together so that the ratio of acid and water in the resultant mixture to be 2:3?
A shredder can only shred 10 documents an hour. The Justice Dept. will be there in 2 hours. There are 100 documents to be shredded. What about the park scene?
I think I get it now. So if i were to take the answer 20 and replace it with the x variable he put on the third cup he drew it will equal 100! (20 + 80) = 100
I had this problem and i cant figure it out, How many liters of distilled water must be added to 80 ltrs. of 60% acid solution to obtain a 50% acid solution? how ...
let x be the amount of distilled water that needs to be added. If there are 80 liters of an acid solution, and 60% is acid, then there's 48 liters of acid, and 32 liters of water. we know that 48/80=60%=0.6, because that's the part of the acid in the solution. So, now we add x water, we add nothing to the acid part, but we do add something to the total acid solution. So now: 48/(80+x)=0.5
Hey at the end of the problem is not 0.20 is ''0.30'' How can you solve the problem with that 0.20 I know you are going to get a 0.20 but that step is confusing to me I can't see from where is that 0.20 coming from.. Thanks for the Teaching..
Thanks, but I already knew how to do that problem :) I was trying to give him hints, not set up the problem for him. Otherwise, he won't learn how to do it for himself.
If 34 people board the fail boat and it takes 4 hours to get 1 lmaonade stand on the poop deck, when can the boat set sail for fail? Please show you work.
Anyone know this? -I read my notifications please help A pharmacist mixed some 10%-saline solution with some 15%-saline solution to obtain 100 mL of a 12%-saline solution. How much of the 10%-saline solution did the pharmacist use in the mixture?
oh no we just did this for 3 daays and then we ran out of time and i have 9 pages of this for homework and 4 pages as a take home test and i dont get it at all so basically im skrewed!!
I don't know why he is dealing with negatives. I would have subtracted .10 x from both sides and 24 from both sides. Then you end up with 4 divided by .20x.
![Mixture Word Problems with Percents: WP11 [fbt]](http://i.ytimg.com/vi/9WAjCTCkbY4/mqdefault.jpg)
![Mixture Word Problems with Percents: WP11 [fbt]](/img/tr.png)
Thanks thes problems were making me feel salty
this seriously helped me to figure this out!! i was so confused when i was trying to do my problems but watching this helped me figure it out so easily!
it's been 13 years. how r u :)
YOU'RE AN AMAZING TEACHER! THANK U POSTING THESE VIDEOS
Thanks so much for the clear explanation.. I have a test tomorrow and this video helped me a lot. :)
Thank you for explaining this clearly. My textbook was confusing. I was stuck on this for a week and have a test in two days. Eureka.. the light bulb went off finally!
Man you really helping me prepare for my test tomorrow. I just couldn't get this but your video is a great. Thank you so much I appreciate it.
11 years later did u pass?
@@fvr417 i don’t need sleep i need answers
Thanks!!!
You saved me the night before the final!
You Rock!
If only all teachers could leave their egos out of the classroom and be this concise and clear, math would be so much more approachable and not scary. Best mixture problem video on the internet! Thank you!!
when i first read the problem, i was completely dumbfounded.
Now, I'm amazed at how simple it was to solve it. thank you!
This was awesome ! Thank You !
No need to use decimals. You can use integers and get the same answer. Eliminates possible misplacement of a decimal point.
10x + (35)(80) = 30(x + 80) gives the same answer of 20 liters.
the teacher teaches way better than other
In East Asia, 5th graders are taught to solve this type of problems with arithmetic. This one is a ratio problem. Algebra is NOT needed. In America, that kind of math teaching is totally missing in elementary schools.
Bill Y. Agreed..
BeatzHD But it still holds the fact, Asian school as far more advanced in all sorts of subjects.... Expecially science and maths
80(0.35/0.3 - 1) ÷ (1 - 0.1/0.3) = 80 × 1/6 ÷ 2/3 = 20
If you learned elementary math in Asia and learned well, you will understand.
if you would solve it as a ratio and proportion problem, would you mind sharing how you solve it?
Bill Y. Thanks for sharing that!
this is the best video on this topic on youtube!
this helped me with a problem I was stuck on for a few hours, so THANK YOU!!!
hehehe, I have gone through Differential equation in the best school that the bay area, CA has. And It took me two minutes to realize this was a simple question. Beautifly explained. Thank you for your dedication.
i feel you haha my math teacher is horrible and i had no idea what was going on in my class and now that i found this i might actually pass!!!!
You rock dude!!! really!!!
I hope they pay you enough for your efforts!!!
GOD BLESS YOU SIR!!!!
hoping for more videos to come!!
I used a combination of the fraction conversion and the Gaussian Elimination method to solve this problem.
First, I converted each decimal into fractions...
x/10+4/5(35)=3y/10 _eq1_
x+80=y _eq2_
10[x/10+28=3y/10] (Multiply eq. 1 by 10)
x+280=3y
x+80=y (New set of equations)
x-3y=-280
x-y= -80 (rearrange each equation in ax+by=c form)
-(x-3y=-280)
x-y= -80 (multiply eq 1 by -1)
-x+3y= 280
x-y = -80 (new set of equations)
2y= 200 (Elimination method)
y= 100 liters (35% solution)
x+80= 100
x= 20 liters(10% solution)
thank you now i know how to do this now i can do my math test and do good
Thank you Sir. This was really helpful.
I missed this class at school back in 8th grade and now that m preparing for university entry tests I needed to revise it. Surprised by how simply you explained it. I can finally do these problems. Yay!
As an Algebra teacher with 30+ years of experience, let me begin by apologizing for my colleague. It's never good form when someone else in the know looks at you and thinks "small animals have been known to gnaw off their legs..."
Thank you so much for posting this. This helps a ton for my advanced physical science test tomorrow.
whaaaaat the fuuuuuuck.
thanks so much! this helped me a lot
Thank you! You explain it so clearly. Thank you!
this is great to get ready for my test tomarrow.
thanks!
Thanks for the video! This was a difficult concept for me to really grasp. The only thing I've done differently was I got rid of those decimals by multiplying each of them by 100 before actually solving the equation.
Amazingly simple video!!! thank you
Perfect explanation! Thank you!
Great video! The drawings really helped me understand the problem a lot better.
Job well done. Your explanation was excellent. Thank you
If you like formulas:
(C1*V1+C2*V2)/Vtotal = Ctotal
Solve for whichever variable the question asks.
Thank You Math TV!. You helped me with my mixture problem for homework. =D
this video beat waiting at the math lab for help! I should have come here first.
Thank you! This video was extremely helpful! :)
these are the ONLY word problems I find easy, everything else is WTF all the way.
THANK YOU
So usefulll@omg, check this, I had the same one as yours, I really had a hard time to solve this kind of exercises.
How many liters of 60% acid solution must be mixed with a 75% acid solution to get 20 liters of a 72% solution??
Answer : 4 liters
This is a systems scenario. You would want to create two separate equations and used both to help create a common solution. ( two variables involved)
That's actually a really easy problem to do. I think you're just trying to bait them into doing your homework for you. Your problem isn't any different than his, just remember you're adding 100% alcohol solution to your 15%.
The problem with mixture equations (for me) is that if you move that table around just a little bit, I'm lost again. I just tried to solve a mixture problem where the instead of x+80 (adding to a solution) it was x-80. I can calculate the equation but I still can't visualize the problem.
Thank you thank you thank you!
Yo thanks for the example! The only thing I would change is that where you put (x + 80)L, you could have just put y instead. Thanks for the solution problem example again!!!!!!!!!
Man I rocked that problem. Ready for university...
great explanation. the best in my opinion.
God bless you, sir.
Hello sir,
Please, solve the following problem using algebra:
Beaker A and B are filled with acid and water in the ratio 2:5 and 7:3 respectively.In what ratio,mixture A and B to be mixed together so that the ratio of acid and water in the resultant mixture to be 2:3?
Thank you soooooo much! Very very helpful!
THANK YOU!!!!
this made it easier.
Thank you so much for the help! I understand it now. This will help me on the exam tomorrow.
Did you pass it
@@aaronobyonek7206 Oh, yeah. I have graduated college since then.
Thank You So Much!!!!!!
How many liters of pure water must be added to 50 liters of salt solution to make a salt solution that has 10% salt?
Thank you so much! This explained so much!
A shredder can only shred 10 documents an hour. The Justice Dept. will be there in 2 hours. There are 100 documents to be shredded. What about the park scene?
Thank you!!!
thanks for your helpful explanation. You seem like a nice fellow.
I think I get it now. So if i were to take the answer 20 and replace it with the x variable he put on the third cup he drew it will equal 100! (20 + 80) = 100
Thank you professor
Thank you very much.
THANK YOU SOOOOO MUCH
Thank you, now I understand mixture problems....
BTW, if you're ever stuck on a math hw problem, just go over to Yahoo Answers and ask for help.
I had this problem and i cant figure it out,
How many liters of distilled water must be added to 80 ltrs. of 60% acid solution to obtain a 50% acid solution?
how ...
let x be the amount of distilled water that needs to be added.
If there are 80 liters of an acid solution, and 60% is acid, then there's 48 liters of acid, and 32 liters of water.
we know that 48/80=60%=0.6, because that's the part of the acid in the solution.
So, now we add x water, we add nothing to the acid part, but we do add something to the total acid solution.
So now: 48/(80+x)=0.5
mind blown
Hey at the end of the problem is not 0.20 is ''0.30''
How can you solve the problem with that 0.20 I know you are going to get a 0.20 but that step is confusing to me I can't see from where is that 0.20 coming from..
Thanks for the Teaching..
omg i now get this 100% thx for posting!!
this makes sense to me now. i have to practice these problems a lot because i'm dumber than a rock.
@Nessie100EC I'm right there with you. I have always struggled with math.
This was so helpful ! Thank you :)
HUGE HELP!!
You are the best
I understand it!! but when I try a different problem on my own my head goes blank =(
U just saved me so hard!! Thank u
Thanks, but I already knew how to do that problem :) I was trying to give him hints, not set up the problem for him. Otherwise, he won't learn how to do it for himself.
If 34 people board the fail boat and it takes 4 hours to get 1 lmaonade stand on the poop deck, when can the boat set sail for fail?
Please show you work.
Good job thank you...this is much more understandable.
That marker annoyed the fuck out of me, other than that pretty sweet video
Anyone know this? -I read my notifications please help
A pharmacist mixed some 10%-saline solution with some 15%-saline solution to obtain 100 mL of a 12%-saline solution.
How much of the 10%-saline solution did the pharmacist use in the mixture?
thanks for the clear explanation.. I got it.
thanks very much, my notes got stolen and I forgot my last 3 months of algebra :(
so im strugglin, even as freshman
You are awesome
Thank you!
actually you can make the decimals whole number. Giving the equation of 10x+2,800=30x+2,400
thx now i understand i can take test now#thailand
Like magic.
it helped me so much
Thank u
haha i have an exam tomorrow as well.
thanks!
Why are there comments 12 years ago when this was posted 6 years ago lol
oh no we just did this for 3 daays and then we ran out of time and i have 9 pages of this for homework and 4 pages as a take home test and i dont get it at all so basically im skrewed!!
Thanks for this
Thanks
How did it become -0.30x?
thank you 😊
how much of each of the two chemicals are mixed in the can, for example, 20% and 80% or 50% - 50%?
30% of salt solution and 70% of the other.
he subtracted 0.30 from both sides.
0.30-0.10=0.20
omggg thankss !!!!
Thank you
same here !
yay TY
I don't know why he is dealing with negatives. I would have subtracted .10 x from both sides and 24 from both sides. Then you end up with 4 divided by .20x.
it's either way thougj
thank youuuuuuuuuuuuuuuuuuuuuuuuu ily