Question

ПОМОГИТЕ ПОЖАЛУЙСТА
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Answer 1

|18-3х|-5х = |18-3*(-7)| - 5*(-7) = |18+21| + 35 = 39 + 35 = 74

Answer 2

Решение:

|18-3x| - 5x

x = -7

1) 18-3x ≥ 0

3x ≤ 18

x ≤ 6

18-3x-5x = 18 - 8x = 18 + 56 = 74

2) 18-3x < 0

3x > 18

x > 6

-(18 - 3x) - 5x = -18 + 3x - 5x = -18 -2x = -2(9+x) = -2•2 = -4

Ответ: 74; -4;