Question

$12x + 5y - (15x - 7y) + ( - 40x + 18y) \\ x + 2(0.5 + 3) \\ - 5(4y - 2x- 7y - 4)$
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Answer 1

Ответ:

Пошаговое объяснение:

1) = 12x + 5y - 15x + 7y - 40x + 18y = -43x + 30y

2) = x + 1 + 6 = x + 7

3) = -20y + 10x + 35y + 20 = 10x + 15y + 20