Question 327386
How do I find the LCD for the given rational expressions, and convert each rational expression into an equivalent rational expression with the LCD as the denominator? 
4
---
x - y 

and 

5x
------
2y-2x
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The denominators are (x-y) and -2(x-y)
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So the LCD is -2(x-y)
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Rewrite each fraction with the LCD as its denominator
4/(x-y) = [4*(-2)]/[-2(x-y)]
and
5x/[2y-2x] = [5x]/[-2(x-y)]
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Cheers,
Stan H.