Ответ:

1) 5(х-4) = х+4

5х - 20 = х+4

5х-х = 20+4

4х = 24

х = 6

2) 7(х-3) = 2х+4

7х -21 = 2х + 4

7х - 2х = 21+4

5х = 25

х = 5

3) 5(х+1) = 2х -7

5х + 5 = 2х - 7

5х - 2х = - 5 -7

3х = - 12

х = -4

4) 2(х-3) = -3(х+7)

2х - 6 = -3х - 21

2х + 3х = 6-21

5х = -15

х = -3

5) 4(х+2) = -х-2

4х + 8 = -х-2

4х+х = -8-2

5х = -10

х = -2

6) 5(х+3) = 2х -3

5х +15 = 2х -3

5х-2х = -15-3

3х = -18

х = -6

7) -3(х+5) = 5(х-2)

-3х -15 = 5х -10

-3х - 5х = 15-10

-8х = 5

х = -5/8