Question

5x/x-2 - 3x/x-2
y/x^2-xy - 1/x-y

Answer 1

$frac{5x}{x-2}-frac{3x}{x-2}=frac{5x-3x}{x-2}=frac{2x}{x-2}$

$frac{y}{x(x-y)}-frac{1}{x-y}=frac{y-x}{x(x-y)}=-frac{1}{x}$