1)2×+15=3×-11 2)2(×-3)=3(2-×) 3)-3(4-×)=2(×-5)
2х+15 = 3х-11 2х-3х= -11 -15 -х=-26 х=26 2(х-3)=3(2-х) 2х-6=6-3х 2х+3х=6+6 5х=12 х=2,4 -3(4-х)=2(х-5) -12 + 3х = 2х - 10 3х - 2х = -10 + 12 х = 2