Помогите решить 9 - 2(3 - 4х) = -2х + 1; 9 + 2(3 - 4х) = 3х - 3; 9 - 2(3 - 4х) = 2х + 1.

9-2(3-4х)=-2х+19-6+8х=-2х+18х+2х=1-310х=-2х=-2:10х=-2\10=-1\5=-0.29+2(3-4х)=3х-39+6-8х=3х-3-8х-3х=-3-15-11х=-18х=-18:(-11)х=1 7\119-2(3-4х)=2х+19-6+8х=2х+18х-2х=1-3х=-2:6х=-1\3