Daughter had lax practice for 1.5 hours & says her brain is fried. Reddit algebra equation fractions
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- Опубликовано: 4 окт 2024
- How to solve equations with fractions? / b5ksaapdvu
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For those wondering: lax is apparently short for lacrosse.
This seems pretty simple. Add 3 to both sides to get (4/3)x=-8, then multiply both sides by the reciprocal of 4/3, 3/4. -8*3=-24 and 1*4=4 (doing (-8/1)*(3/4)) to get -24/4, which simplifies to x=-6
Now for the other equation. First, subtract both sides by 1 to get (3/5)x=6 Multiply by the reciprocal again (5/3) 5*6=30, so it's 30/3, which simplifies to x=10
Thanks, its refreshing my memory.
Now I can help my Daughter when he don't understand it.
he?
@@djurius hmm?
I think she's referring to her husband @@djurius
@@s4y1e oh no
he..? 😰
Should I learn to do it like the video instead of like this?
4/3x-3=-11
4/3x=-8
4x=-24
x=-6
nvm it's 100 times faster to do it like in the video...good to know, somehow I never heard about this before
It's exactly the same, it's just doing the last 2 steps at the same time. Instead of looking at it as 4 multiplying X and 3 dividing X, it's looking at it as 4/3 multiplying X
Hey! I know you move the whole number first and then deal with the fraction. I often tell my students we do "reverse BEDMAS" when isolating a variable. Do you have other wording that may work better? Thanks and great vids!
This bedmas has problems. It misleads you to think division comes before multiplication, which is wrong. It is on the same rank.
When I discuss solving equations, I start with "one-step" equations (meaning one only needs to complete one operation to solve for the variable). When we then move on to multiple-step equations, I point out that the starting goal is to rewrite the equation into a form we have already seen.
Using the example 3x - 2 = 7, I tell my students that before we can solve for x we must solve for 3x.
3x = 9
NOW, we can solve for x.
well you might say , first "gather the integers (the wholes) to one number" and then see what is to be done .
all to avoid getting
3*(4/3)x - 9 = - 33 ,
or other rather large numbers .
I clicked thinking there might be something unexpectedly difficult hiding.😂
Me too 😂
Sometimes the easiest calculations are the most beautiful.
did these in my head
When reducing a fraction times x to just x, is it bad practice to look at the left side as fraction divided by fraction = 1? I personally find that faster to work out in my head than trying to multiply the reciprocal (even though that MUST be done on the other side)
Dividing by a fraction or multiplying by its reciprocal is the same thing. Look at it whichever way is easiest for you! 🙂
I would have multiplied everything by the denominator than solved
Did it in my mind
After listening to crazy news, so restful to watch you do a beautiful math problem. Logic is the antidote.
Wow that is so cool, thank you ❤
-6
This seems easy... This kind of thing is on the tests I give my 6th graders...
Well, anyone taking longer than 2 minutes per equation can not claim they are "good at math" (exceptions for logicians and topologists do apply).
"BOT good at math" and also not good at spelling! 😂
(Sorry, couldn't resist.)
is this method and taking LCM different?
Well, it's basically the same, just the LCM in these sort of situations is simply more inefficient. Multiplying by reciprocals is two LCM steps in one.
Easy
average americans smh
If you haven't done math like that in a long time any person would forget it. it's a parent so there's nothing wrong with not knowing algebra
Not every adult's work specializes in maths.
@@amongusgamer-fw2mn im talking about the daughter though
@@amplifire- it's a 6 grader... Blame the curriculum not the people