Ответ:

Пошаговое объяснение:

3х + (13 - 8х) = 33

3х + 13 - 8х = 33

-5х + 13 = 33

-5х = 33 - 13

-5х = 20

х = 20 : (-5)

х = - 4

2.

6х + 12 = - 7х + 25

6х + 7х = 25 - 12

13х = 13

х = 13 : 13

х = 1

х + 6 (3 - 3х) = 35

х + 18 - 18х = 35

-17х = 35 - 18

-17х = 17

х = 17 : (-17)

х = -1

3.

1/3 * х + 1 = - 1/4 * (х + 4/5)

1/3 * х + 1 = - 1/4 * х - 1/5

1/3*х + 1/4*х = - 1/5 - 1

7/12 * х = -6/5

х = -6/5 : 7/12 = -6/5 * 12/7

х = - 72/35 = - 2 2/35

4.