Question

срочно 100б................

Answer 1

$frac{(y-7)(y+7)}{(y+7)(y+7)} * frac{y(y+7)}{7(y-7)} = frac{y}{7} = frac{70}{7} =10 \ \ p+3=mk \ \ n+2=mk \ \ frac{n+2}{p+3} = frac{mk}{mk} =1$