Ответ:
x = -5
Пошаговое объяснение:
1) -40 x (-7x + 5) = -1600
= -7x + 5 = 40
= -7x = 40 - 5
= -7x = 35
= x = -5
2) (-20x - 50) x 2 = 100
= -40x - 100 = 100
= -40x = 100 + 100
= -40x = 200
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Ответ:
x = -5
Пошаговое объяснение:
1) -40 x (-7x + 5) = -1600
= -7x + 5 = 40
= -7x = 40 - 5
= -7x = 35
= x = -5
2) (-20x - 50) x 2 = 100
= -40x - 100 = 100
= -40x = 100 + 100
= -40x = 200
= x = -5