Verified answer

[tex]4x - 5 = 15 \\ 4x = 15 + 5 \\ 4x = 20 \\ x = 20 \div 4 \\ x = 5 \\ \\2(3x + 4) = x + 13 \\ 6x + 8 = x + 13 \\ 6x - x = 13 - 8 \\ 5x = 5 \\ x = 5 \div 5 \\ x = 1 \\ \\ - 3x = - 9 \\ x = - 9 \div ( - 3) \\ x = 3 \\ \\ 3x + 4 = - 2x - 6 \\ 3x + 2x = - 4 - 6 \\ 5x = - 10 \\ x = - 10 \div 5 \\ x = - 2[/tex]

Пошаговое объяснение:

1)

4х - 5 = 15

4х = 15 + 5

4х = 20

х = 20 : 4

х = 5

2)

2(3х + 4) = х + 13

6х + 8 = х + 13

6х - х = 13 - 8

5х = 5

х = 5 : 5

х = 1

3)

-3х = -9

х = -9 : (-3)

х = 3

4)

3х + 4 = 2х - 6

3х - 2х = -6 - 4

х = -10