Объяснение:

А)4x - 5 - (7x + 8) = 2

4x - 7x - 8 = 7

4x - 7x = 15

-3x = 15

x = -5

Б)9z +17 - (4z - 5) = 38

9z - (4z - 5) = 38 - 17

9z - (4z - 5) = 21

5z + 5 = 21

5z = 16

z = 16/5 = 3 1/5

z = 3,2

В)24 - (x³ + 8x - 17) - 5 - 5x - x³

24 - x³ - 8x + 17 - 5 -5x - x³

36 - 13x - 2x³

Г) 19 - (3x² - 2x) - (6x - x²) - 7 - 2x²

19 - 3x² + 2x - 6x + x² - 7 -2x²

12 - 4x² - 4x