Предмет: Алгебра, автор: ulanaurasova11

Решите уравнения
-7х – 40 = 2
5х + 14 = 7х + 20
2(х-1) – 5х = 13

Ответы

Автор ответа: tastaandreeva
1

Ответ:

1) -7х=2+40

-7х=42

х-6

2) 5х-7х=20-14

-2х=6

х=-3

3) 2х-2-5х=13

-3х-2=13

-3х=13+2

-3х=15

х=-5

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