2(x+3)(x-2)-(2x+1)(x-3)-7=0 2х+6(x-2)-2х-1(x-3)-7=0 2х²-4х+6х-12-2х²-6х-х-3-7=0 -4х-12-3-7=0 -4х=22 х=22:-4 х=-5.5