решить подробно

-4(3+х)=9

3(2-5х)=8х

5(8+2х)=10-4х

2(4х-)=4(х+5)

-4(3+х)=9

-12-4х=9

-4х=9+12

-4х=21

х=-21/4

х=-5,25

3(2-5х)=8х

6-15х=8х

-15х-8х=-6

-23х=-6

х=6/23

5(8+2х)=10-4х

40+10х=10-4х

10х+4х=10-40

14х=-30

х=-30/14

2(4х)=4(х+5)

8х=4х+20

8х-4х=20

4х=20

х=20/4

х=5