Срочно распишите именно уровнения

1) 8x + 5,9 = 7x + 20

8x - 7x = 20 - 5,9

-x = 14,1

x = -14,1

2) -2x + 16 = 5x - 19

-2x - 5x = -16 - 19

-7x = -35

x = 5

3) -2/5x + 3/5 = 1/5x

-2/5x - 1/5x = -3/5

-3/5x = -3/5

x = 1

4) 2/3z = 2/9z - 4/9

6/9z - 2/9z = -4/9

4/9z = -4/9

z = -1

5) 1,3x - 11 = 0,8x +5

1,3x - 0,8x = 5 + 11

0,5x = 16

x = 32

6) -4 (-x + 7) = x + 17

4x - 28 = x + 17

4x - x = 17 + 28

3x = 45

x = 15

7) c - 32 = -7 (c + 8)

c - 38 = -7c - 56

c + 7c = -56 + 38

8c = 18

c = 2,25