4х+5(3-2х)=5-11х 19-2(3х+8)=2х-37 8х+3(7-2х)=4х+3 23-49(3х+80)=1-17х

1)4х+5(3-2х)=5-11х; 4х+15-10х=5-11х; -6х+11х=5-15; 5х=-10; х=-2; /// 2) 19-2(3х+8)=2х-37 ; 19-6х-16=2х-37; -6х-2х=-37-3; -8х=-40; х=5; /// 3)8х+3(7-2х)=4х+3 ; 8х+21-6х=4х+3; 2х-4х=3-21; -2х=-18; х=9; 4)23-49(3х+80)=1-17х; 23-147х-3920=1-17х; -147х+17х=1+3897; -130х=3898; х=-29 64/65