1) 3X + 15 0 : 2) -8 + 2X = OX-4 3) 7X-4X - 16 4) - 5X + (7 - 3X)=-9

Пошаговое объяснение:

1)

3х + 15 = 0

3х = 0 - 15

3х = -15

х = -15 : 3

х = -5

2)

-8 + 2х = 6х - 4

2х - 6х = -4 + 8

-4х = 4

х = 4 : (-4)

х = -1

3)

7х - 4 = х - 16

7х - х = -16 + 4

6х = -12

х = -12 : 6

х = -2

4)

-5х + (7 - 3х) = -9

-5х + 7 - 3х = -9

-5х - 3х = -9 - 7

-8х = -16

х = -16 : (-8)

х = 2