Math help?

Question

Solve.

9 / y+4 = 8 / y-1

If no solution then just press the letter N

Answer 1

This is easy to solve! When you have two fractions that are equal to each other A/B = C/D, you multiply the opposing fraction's denominator times the other's numerator then set them equal -- i.e. AD = BC.

So you have 9 / y+4 = 8 / y-1

Rewrite as 9*(y-1) = 8*(y+4)

Now multiply out to get 9y-9 = 8y+32

Get the y's on one side: y = 41

Cool, huh? Solve all fractions A/B = C/D this way!

~ ♥ ~

Answer 2

You need to get those variables off the bottom of your fractions. Therefore you start by multiplying both sides by (y + 4) and then both sides by (y - 1). You do that because the variables on the bottom will cancel out on one side, and only be on the top of the other. So you have ...

9 (y - 1) = 8 (y + 4) Now you should distribute.

9y - 9 = 8y + 32 Now get both variables on one side and combine.

y - 9 = 32 I'll bet you can do the rest in your head.

And odds are someone will give you the answer anyway.

Good luck with the rest of your homework.

Answer 3

I'm assuming that you left out the parens.

The equation

9 / (y+4) = 8 / (y-1)

becomes
9 * (y-1) = 8 * (y+4)

or
9y -9 = 8y + 32

or y = 41

Answer 4

Hmmmm... assuming you left out the parenthesis...
9/(y+4)=8/(y-1)

um... cant get you past that sorry! im only in sixth grade, gimme a break ok? we just started.

Answer 5

easy you have
9 8
----- = --------
y+4 y-1

so 9(y-1)=8(y+4)
9y-9=8y+32
1y=41
y=41
theres your answer

Answer 6

I'm pretty sure y= -1/5 if I did it correctly in my head.

Answer 7

okay, im not posotive but i don't think there is no solution

it came out like y+1.13888888888...=y and thats not right