Friday
April 18, 2014

Homework Help: math

Posted by Anonymous on Thursday, February 23, 2012 at 8:54am.

I need help solve the equation by fractions

8/(21-y) = 12/(y+19)

I think the answer is y = 5, i just need to know how to do work out. i done some solution like this

first multiply by(21-y)(y+19)(assuming that y = 21 and y = 19:

(21-y)(y+19)8/(21-y) = (21-y)(y+19)12/(y+19)

then cancel and multiply out the brackets:

8(y+19) = 12(21-y)

that is

8x+152 = 12x-96

finally,rearrange the equation as

160x = 104

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math/fractions - I need help with subtracting fractions I have no idea if I'm ...
math i need help please - solve the equation x+13=-8 a.21 b.-21 c.5 d.-5
math - I need help on a math question. It says to write two fractions with a ...
Algebra - solve x+21/x+3<2 x+21/x+3 - 2(x+3)/x+3 <0 x+21-2(x-3)/x+3<0 x...
Math-Fractions - How would I solve these two problems. (We have to simplify our ...
Math - Explain how to solve? Which equation below shows the equation y = 1/4x...
Math / Fractions - I am having a hard time figuring out how to solve these ...
math - SOLVE THE EQUATION BY USING EQUIVALENT FRACTIONS? 1. 12/21=X/7, What's X...
Math - I need help with these three problems. They are on a Study Guide and I ...
math - I need help with these three problems. They are on a Study Guide and I ...

Search
Members