# Very quick algebraic manipulation help

1. Sep 6, 2009

### dalarev

1. The problem statement, all variables and given/known data

x and y are actually variables for another problem I have, but that doesn't matter. Given:

$$\frac{X+Y}{X-Y}$$*$$Z_{0}$$ = $$Z_{L}$$

3. The attempt at a solution

I'm trying to solve for Y here. I have the answer, it's part of my notes, but I can't work out the algebra to derive it.

2. Sep 6, 2009

### tiny-tim

Hi dalarev!

Just multiply both sides by (X - Y), and then put all the Y terms on one side, and all the other terms on the other side.

3. Sep 6, 2009

### dalarev

Doh! :facepalm:

I tried to do it in my head and forgot the expand the factors I get on each side. Geez..

Thanks for the quick response, /thread.