Решите уравнение (7×+3) - (5×-7)= (2×-5) - (3×-6
(7х+3)-(5х-7)=(2х-5)-(3х-6) 7х+3-5х+7=2х-5-3х+6 7х-5х-2х+3х=-5+6-3-7 3х=-9 х=-9:3 х=-3