Question

7x=-30+2x ???????????

Answer 1

7х-2х= -30

5х= -30

х= -30:5

х= -6

Answer 2

7х = - 30 + 2х

7х - 2х = - 30

5х = - 30

х = - 30 : 5

х = - 6

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Проверка:

7 · (-6) = -30 + 2 · (-6)

- 42 = - 30 - 12

- 42 = - 42