Posted by **Olivia** on Wednesday, January 5, 2011 at 12:21am.

x over y minus y over x divided by 1 over y plus 1 over x.

- algebra -
**drwls**, Wednesday, January 5, 2011 at 9:04am
Please use numbers or letter symbols, not words, to represent algebraic expressions. They are much easier to work with.

I will assume this is what you mean:

(x/y - y/x)/(1/y + 1/x)

Multiply both numerator and denominator by xy. This will not change the value of the fraction, and leads to:

(x^2 - y^2)/(x + y)

Next, factor the numerator and cancel out the (x+y) that will appear in both numerator and denominator.

You should end up with just x - y

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