Question

Срочно !!!! Помогите ,

Answer 1

[(2x+2y)/y]÷(y²-x²)/5y²  - 10x/(y-x)=2(x+y)·5y²/y(x-y)(x+y)  +  10y/(x-y) =
=сокращаем = 10y/(x-y)+10y/(x-y)=20y/(x-y)