Verified answer

Ответ:

1) 5x + 3 = x + 7

5x - x = 7 - 3

4x = 4

x = 4/4

x = 1

2) 5x + 3 = x - 9

5x - x = -9 -3

4x = -12

x = -12/4

x = -3

3) 5x - 4 = x - 4

5x - x = -4 + 4

4x = 0

x = 0/4

x = 0

4) 6x - 3 = x + 7

6x - x = 7 + 3

5x = 10

x = 10/5

x = 2

Ответ:

5х+3=х+7

5х-х=7-3

4х=4

х=1

5х+3=х-9

5х-х=-9-3

4х=-12

х=-3

5х-4=х-4

5х-х=4-4

4х=0

х=0

6х-3=х+7

6х-х=7+3

5х=10

х=2