7(-3+2х)=-6х-1
-21+14х=-6х-1
14х+6х = -1+21
20х = 20
х =1
7(-3+2х)=-6х-1 -21+14х=-6х-1 14х+6х = -1+21 20х = 20 х =1
7(-3+2х)=-6х-1
-21+14х=-6х-1
14х+6х = -1+21
20х = 20
х =1
7(-3+2х)=-6х-1 -21+14х=-6х-1 14х+6х = -1+21 20х = 20 х =1