-3.7*(2.5х-7.6)=-3.66+2.1х
-3.7*(2.5х-7.6)=-3.66+2.1 х-3.7 × 2.5х - (- 3.7) × 7.6 = - 3.66 + 2.1х - 9.25х + 28.12 - 2.1х = - 3.66 - 11.35х = -3.66 - 28.12 - 11.35х = - 31.78 - х = - 31.78 : 11.35 - х = - 2.8 х = 2.8
-9,25х+28,12=-3,66+2,1х -9,25х-2,1х=-3,66-28,12 -11,35х=-31,78 х=2,8