А)(5x-3)+(7x-4)=8-(15-11x) б)(4х+3)-(10х+11)=7+(13-4х) в)(7-5х)-(8-4х)+(5х+6)=8 г)(3-2х)+(4-3х)+(5-5х)=12+7х

а) (5х-3)+(7х-4)=8-(15-11х) 5х-3+7х-4=8-15+11х 5х+7х-11х=8-15+3+4 х=0 б) (4х+3)-(10х+11)=7+(13-4х) 4х+3-10х-11=7+13-4х 4х-10х+4х=20-3+11 -2х=28 х=28/-2 х=-14 в) (7-5х)-(8-4х)+(5х+6)=8 7-5х-8+4х+5х+6=8 4х=8-5 4х=3 х=3/4 х=0,75 г) (3-2х)+(4-3х)+(5-5х)=12+7х 3-2х+4-3х+5-5х=12+7х -10х-7х=12-12 -17х=0 х=0