1)2×+15=3×-11
2)2(×-3)=3(2-×)
3)-3(4-×)=2(×-5)

2х+15 = 3х-112х-3х= -11 -15-х=-26х=262(х-3)=3(2-х)2х-6=6-3х2х+3х=6+65х=12х=2,4-3(4-х)=2(х-5)-12 + 3х = 2х - 103х - 2х = -10 + 12х = 2