Ответ:

1. 7х-5х=2-10

2х=-8

х=-4

2.. 8х-6х=13-11

2х=2

х=1

3... -2х+6х=5-17

4х=-12

х=-3

4. -6х+10х=-3-5

4х=-8

х=-2

5. 9х-7х=5-13

2х=-8

х=-4

6. -3х+7х=-4-4

4х=-8

х=-2