Решение и ответ:

10 ⋅ x - (x + 9), при x = -4

1 способ

10 ⋅ x - (x + 9) = 10x - x - 9 = 9x - 9 = 9 · (-4) - 9 = -36 - 9 = -45

2 способ

10 ⋅ x - (x + 9) = 10 · (-4) - (-4 + 9) = -40 - 5 = -45