0,6-(1,3x+1)=2.8x-13.52
0.6 - (1, 3 х + 1) = 2,8 х -13, 52 0, 6 - 1, 3 х - 1 = 2, 8 х - 13, 52 - 1,3 х -2,8 х = -13, 52 -0,6 +1 - 4, 1 х = -13, 12 х = - 13, 12 : ( -4, 1) х = 3, 2
0,6-1,3х-1=2.8х-13.52 -2.8х-1.3х= -13.52-0.6+1 -4.1х=-13.12 х=-13.12:(-4.1) х=3.2