Question

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

Answer 1

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

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