А)2x-4(x+7)=3(2-x) б)-5(2-2x)=2(x-3)+4
2х -4х -28 = 6-3х -2х+3х = 28 +6 х = 34 б) -10 +10х = 2х -6 +4 10х -2х = 10 -6 +4 8х =8 х = 1