marat198641

Ответ:

1) 3х - х = 15 + 3

2х = 18

х = 9

2)-4х = 4

х = -1

3)2x - x = 13-6

х =7

4)-7х = -21

x = 3

5)2x =10

x = 5

6) x = 8

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