Question

1) 8х+12=5х+3
2) 3(2х+1)+7=4
3) 6+3(5х-7)=4х+7
4) 3(7х-4)-4(6х+5)=х
5) 3х-5(2х+3)-6(5х-4)=-28
6) 3(х+21)+2(х-4)=5(х+11)

Answer 1

1)8х-5х=3-12

3х=-9

х=-3

2) 6х+3 +7=4

6х=4-3-7

х=0

Нет решения

3)6+15х-21=4х+7

15х-4х=7-6+21

11х=22

х=2

4)21х-12-24х+20=х

21х-24х-х=12-20

-4х=-8

х=-2

5)3х-10х+15-30х-24=-28

3х-10х-30х=-28-15+24

-37х=-19

х=-19/37

6)3х+63+2х-8=5х+55

3х+2х+5х=55-63+8

нет решения