7х-5-4(2х-9)=7х-5-8х+36=-х+31 х-7-3(2х-8)=х-7-6х+24=-5х+17 ==============
спс
7х - 5 - 4(2х - 9)=7x-5-8x+36=-x+31 х - 7 - 3(2х - 8)=x-7-6x+24=-5x+17