Ответ:

Объяснение:

1. -6x - 13 = -7x - 14

-6x + 7x = - 14 + 13

X = -1

2. 5x = 8 + 3(2x + 3)

5x = 8 + 6x + 9

5x - 6x = 8 + 9

-1x = 17

X = - 17

3. 3(4x + 1) + 3x = 2x - 23

12x +3 +3x = 2x - 23

12x + 3x - 2x = - 23 - 3

13x = - 26

X = - 2