Verified answer

1)5х+7=4х-6

5х-4х=-6-7

х=-13

2)6-8х=2х+10

-8х-2х=10-6

-10х=4

х=4:(-10)

х=-0.4

3)4х-12=6х-6

4х-6х=-6+12

-2х=6

х=-3

4)5(х-2)=14

5х-10=14

5х=14+10

5х=24

х=4,8