Решите четыре примера:

1) - 8+7 (-х-2) = 6

2) 2 - 2 (3 х-4) = - 2

3) 10 (х-9) = 7

4) 9 (х-5) = - х

1)

- 8 - 7x - 14 = 6

- 7x - 22 = 6

- 7x = 28

7x = - 28

x = - 4

2)

2 - 2 (3x - 4) = - 2

2 - 6x + 8 = - 2

- 6x + 10 = - 2

- 6x = - 12

6x = 12

x = 2

3) 10 (x - 9) = 7

x - 9 = 7/10

x = 9 + 7/10

x = 9,7

4) 9 (x - 5) = - x

9x - 45 = - x

10x = 45

x = 4,5