Решить : 6-5х=-9х-2 2(5х-1)+8=6 4+5(3х-4)=7х-8 6(3х+4)-5(4х-3)=29 - вопрос №659225186453478634543292472390189 от Самина2006 21.10.2020 00:37

Question

Математика: Решить : 6-5х=-9х-2 2(5х-1)+8=6 4+5(3х-4)=7х-8 6(3х+4)-5(4х-3)=29 2х-4(7х-3)=10-5(3х-7) 11(2х-3)=5(4х-6)+2х

Самина2006 · Answer

6-5х=-9х-2 9х - 5х = -2 - 6 4х = -8 х = -2
2(5х-1)+8=6 10х - 2 + 8 = 6 10х = 6 + 2 - 8 10х = 0 х = 0
4+5(3х-4)=7х-8 4 + 15х - 20 = 7х - 8 15х - 7х = -4 + 20 - 8 8х = 8 х = 1
6(3х+4)-5(4х-3)=29 18х + 24 - 20х + 15 = 29 - 2х = 29 - 39 -2х = - 10 х = 5
2х-4(7х-3)=10-5(3х-7) 2х - 28х + 12 = 10 - 15х + 35 2х -28х + 15х = 10 + 35 - 12
-11х = 33 х = -3
11(2х-3)=5(4х-6)+2х 22х - 33 = 20х -30 + 2х 22х - 20х - 2х = 33 - 30 0х = 3