Решить уравнения 9-(8х-11)=12+7х
9 - (8х - 11) = 12 + 7х 9 - 8х + 11 = 12 + 7х 9 + 11 - 12 = 7х + 8х 8 = 15х х = 8 : 15 х = 8/15 -------------
9-(8 x-11)=12+× 9-8×+11=12+7× 20-8×=12+7× -8×-7×=12-20 -15×=-8 ×=8 15