Thank you so much. The reason I'm only really good at sciences (including comp sci) is because I only remember to do things if I know why. I couldn't remember anything about differentiation by first principles if I didn't know what we were trying to achieve, and just as such you have explained *why* we do what we do
Bro thank you bro I was having trouble how to do it as a grade 7 student and I get it after this video thank you so much after a very long time I finnally get it.❤❤
how is -12y-7y = positive 19? shouldnt it equal -19? But even without the negative next to the 12y it would be positive 5. or maybe 12y minus negative 7y, which does equal +19?
There is however a different solution to x+3y and 4x-7y.To make x the subject of the formulae of the first equation we get x=11-3y.Therefor when substituting x into the second equation we get 4(11-3y)-7y=6.After that we multiply everything in the bracket with 4.So after multiplying we get 44-12y-7y=6.We then group like terms which require transposing so after grouping like terms we get -12y-7y=6-44.After simplifying this equation we get -19y=-38.We then divide by 19 at both sides so 19y divided by 19y will answer with y.-38 divided by 19 gives us -2.So y=-2.To find x we substitute y in the first equation and therefor x+3(-2)=11.We then simplify the equation which will be x+-6=11.We then transpose the 6 to the 11 to group like terms.So then x=11+6 (The sign of the transposed value turns into the opposite sign.).So then x=17.To test if we are correct use any of the equations like x=3y=11.Simplify in the expression we get 17+3(-2)=11.However both answers are correct.
y is not -2, -19y=-38, so -y=-2 and y=2, and you got rid of the minus on the left, but not on the right, which you can't do, you need to un-minus both sodes
Can’t you plug Y=2 into the first line making it become 6 and then make 6 go to the other side and make it negative 6 and then subtract eleven w -6 to get 5??
Because then it wouldn't work. Using equation II, we have solved the value of x. Later on, the equation we had rearranged will have to be used. We put the value of x in the re-arranged equation I and we get the value of y. Hope this helped!
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"2x=11-3y" divide bothsides by 2 x= 5.5-1.5y (THIS IS MY MADE UP EXAMPLE THXS) edit; "2y=3x-7" divide both sides y=1.5x-3.5 so yh (THIS IS MY MADE UP EXAMPLE THXS SO DONT USE TO SOLVE THIS EXACT EQUATION THX LUVS)
I have a Question? When you isolate the variable Y in the first equation why do you change sign in 7,in third equation apear -7 and sevent stay in same side of iquality.i don't know that.If you do that I have to do that.i didn't know that .thankyou
You can break it down into smaller steps. You could subtract 3x and make it -y=7-3x and then if you flip the signs it becomes y=-7+3x which we write the other way round as y=3x-7
Easy solve by substitution. Original New equation X + 3y = 11. -4x-12y = -44 4x - 7y = 6. 4x- 7y = 6 Mult top row by -4 -------------- - 19y= -38 Divide both sides by -19 Now y = 2. Plug in 2 for y and …. X+ 3(2) = 11 X + 6 = 11 -> subt 6 from both sides leaving X = 5 Plug x= 5 and y = 2 into both original equations as proof
This method was surprisingly easier than what my teacher taught me 💀
The teachers are always giving hard methods
No really though
Cause teachers are shit 😂
Exactly
@@arthurmarston7128theyre just shit at teaching
Thank you so much for the explanation. This was a really difficult concept for me to understand. Thank u again for a great explanation 😀
.
Even for me
@@JardeOri-kc8ov what do you mean even for me? You think you’re Jimmy neutron? 😂
Me too, I get it now
BRO'S LAUGH STUNNED MY HEART, NEVER LEAVING MATHS SIDE AGAIN
huh?
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You my friend are the goat I can't tell you how useful this was much love❤
Thank u bro I am seeing this video when there is 2 days to my checkpoint exams It helped me so much thank u so much God bless u
Thank you soo much you saved my day because tomorrow is my exam and my concept wasn't clear but you saved my dayyy
Did you pass?
Still can't get it...
Your cooked bro
@@DakotaPeters-kp9ux😂
@@DakotaPeters-kp9uxfr (I can’t do them either)
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Thank you so much. The reason I'm only really good at sciences (including comp sci) is because I only remember to do things if I know why. I couldn't remember anything about differentiation by first principles if I didn't know what we were trying to achieve, and just as such you have explained *why* we do what we do
Thank your for this short and concise video. Definitely leaving a like
Thank you so much for this explanation it has being a very difficult topic for me to understand again thank you
Thank you I understand after that, Everything my teacher explained to me I didn't understand.thank you again 🙏
Bro thank you bro I was having trouble how to do it as a grade 7 student and I get it after this video thank you so much after a very long time I finnally get it.❤❤
Thank you so much 🥰💘 this topic is very hard to understand.But now I understand
Thanks a lot bro! It really helped a lot... Keep up the Great Work!
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Thank you Sir,
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You made things very easy for me
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Love your voice, love your explanation. Thanks so much!!
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Same here
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He explained it soo easily in 5 mins my teacher has been explaining it for 2 week didn’t understand stand a thing😭
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but its out of 80..
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tyssmmm, ive a maths test tomorrow and ngl this vid really helped
how is -12y-7y = positive 19? shouldnt it equal -19? But even without the negative next to the 12y it would be positive 5. or maybe 12y minus negative 7y, which does equal +19?
Like, it's wrong
when you put a number from one side of an equals (=) sign to the other .. you change it from positive to negative. or negative to positive.
Exactly
-×-=+
I thought l was only one seeing tht
Wowww thanks to you bro I pass my exam you don dooo ohh Chia that I could have failed this thing 🎉🎉 I love this
Thank you so much for helping me.
I understand better now..
Thank you so much😊🥺💯. This is my weak area in maths and I can now do it better😊🙏
Exam tomorrow and i still dont know how to do them
Well, did you at least pass ?
Thank you very much.Your explanations are quite clear and easy to understand.
Hi am from Cameroon a high school student thanks so much for video it clerified my dout 😊😊🙏🙏
Doubt
You know what you teach math very well.bro full support to you thank you so much
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Thank you today is my math exam and now I understand how to solve it thx
that was easy for the first time willing to see the next one in I think it will be a difficult one if there is
Thanks! Needed a quick recap, and this provided.
Thank you so much, this is so helpful ❤
Tomorrow is my paper thank you soon much I understood the question
There is however a different solution to x+3y and 4x-7y.To make x the subject of the formulae of the first equation we get x=11-3y.Therefor when substituting x into the second equation we get 4(11-3y)-7y=6.After that we multiply everything in the bracket with 4.So after multiplying we get 44-12y-7y=6.We then group like terms which require transposing so after grouping like terms we get -12y-7y=6-44.After simplifying this equation we get -19y=-38.We then divide by 19 at both sides so 19y divided by 19y will answer with y.-38 divided by 19 gives us -2.So y=-2.To find x we substitute y in the first equation and therefor x+3(-2)=11.We then simplify the equation which will be x+-6=11.We then transpose the 6 to the 11 to group like terms.So then x=11+6 (The sign of the transposed value turns into the opposite sign.).So then x=17.To test if we are correct use any of the equations like x=3y=11.Simplify in the expression we get 17+3(-2)=11.However both answers are correct.
;-;
Yeah you are correct
y is not -2, -19y=-38, so -y=-2 and y=2, and you got rid of the minus on the left, but not on the right, which you can't do, you need to un-minus both sodes
@@RayansCompilationno the video was right
thanks man my teacher tried to explain it to me in every way but i still wouldn't get it thank you:)
Thank you! Keep up the good work 🙂
Waw you are such a good teacher thanks man
Thanks this is so easy and understandable ❤
He teaches better than my techer with 15 years experience
Thank youu man this help me so much and I can't believe I actually understood it :-O
YOU HAVE A BIG FUTURE
Thanks Just continue showing many qns🎉
A much better and faster method of doing this. Mucho Gracias
brilliant explaining bro❤
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Thanks you're a life saver
Where did we get the -3y in step 1?
Can’t you plug Y=2 into the first line making it become 6 and then make 6 go to the other side and make it negative 6 and then subtract eleven w -6 to get 5??
very helpful for me , tqsm 🙏
3:51 isn’t equation 3 supposed to be -y=7-3x
Thank you soo much you are a life saver
bro be saving us from failing💀
Thanks I really enjoyed the lesson
You earned a new subscriber
Wont y become negative 2 cause positive 44 got switched to the other side so 6 minus negative 44 equals to negative 38 so help
No because sir didn't switch 44 he switched -12y and -7y
Please if it was t+3u=2 and 3t+5u=_10 what would you do please I need a quick reply🙏🙏
cool bro continue like that
Thank you so much 😻❤️❤️
Thanks for making it easier🎉
3:37 why didn’t you rearrange equation 3 the same way you arranged it in the first example, just curious
i was wondering the same thinf
Because then it wouldn't work. Using equation II, we have solved the value of x. Later on, the equation we had rearranged will have to be used. We put the value of x in the re-arranged equation I and we get the value of y. Hope this helped!
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lifesaver my teacher is kinda Dogshit and you really came in clutch before my exam
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I looooovvvvvveeeee this video 😊
The way you explained everything step by step is excellently easier and better than what my teachers have ever explained 😊❤
👍keep up the good work 👍👍
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I love this method easy peacy ❤❤❤❤❤❤
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Exam tmrw morning. Only started studying now, it’s 10:30pm. Thanks for the clear and fast explanation lol 🤣
omg same i’ve a math exam tomorrow but it’s 10:15 rn
@@M3sh0 10:28pm for me 😂
I only found this now... but i got an entrance exam to write
When I was in class, my brain was in loops of multiverses
Ty bro cause i was tweaking in class
U r awesome bro
what if the coefficient is not one but 2 or three?
Then just simplify it
"2x=11-3y"
divide bothsides by 2
x= 5.5-1.5y
(THIS IS MY MADE UP EXAMPLE THXS)
edit;
"2y=3x-7"
divide both sides
y=1.5x-3.5
so yh
(THIS IS MY MADE UP EXAMPLE THXS SO DONT USE TO SOLVE THIS EXACT EQUATION THX LUVS)
Where did you get this 7y
Thank you so much, i understood it very well. Wow, 8th grade math is tough. Anyways thank you again
I have a Question? When you isolate the variable Y in the first equation why do you change sign in 7,in third equation apear -7 and sevent stay in same side of iquality.i don't know that.If you do that I have to do that.i didn't know that .thankyou
You can break it down into smaller steps. You could subtract 3x and make it -y=7-3x and then if you flip the signs it becomes y=-7+3x which we write the other way round as y=3x-7
this was sooo helpful😍
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Thanks a lot.. you helped me a lot with my math wrk
Thanks alot , your voice is very reassuring
Easy solve by substitution.
Original New equation
X + 3y = 11. -4x-12y = -44
4x - 7y = 6. 4x- 7y = 6
Mult top row by -4
--------------
- 19y= -38 Divide both sides by -19
Now y = 2.
Plug in 2 for y and ….
X+ 3(2) = 11
X + 6 = 11 -> subt 6 from both sides leaving X = 5
Plug x= 5 and y = 2 into both original equations as proof
Nice
Where is the 38 19 from
Thanks This Helped :)
Thank you for the explanation
I have learned nothing the words on the screen is hiding the equation and I'm not see the whole equation
Is it not -2 because you said we collect like terms -12y-7y =-19y
If you have you have to negative numbers they turn positive
Hi,
how did u get 19x 4:24
you added 10x by 9x
Thx@@dragon_a9yo651
Please do you use this method only when there is a variable with a coefficient of 1?🤔🤔
You can do it in any situation, but it might not be the easiest in other circumstances
Thanks a lot! 👍😀👌
Wait in the second question,before you substitute, y is negative
So wont you have to times by -1 to get +y
So it will be y=3x-7