-8x+4=28
-8x=28-4
-8x=24
x=24/-8
х=-3
-5x-13=12
-5x=12+13
-5x=25
x=25/-5
х=-5
-6x-6=-3
-6x=-3+6
-6x=3
x=3/-6
х=-0,5
-7x-3=11
-7x=11+3
-7x=14
x=14/-7
х=-2
-8x+4=28
-8x=28-4
-8x=24
x=24/-8
х=-3
-5x-13=12
-5x=12+13
-5x=25
x=25/-5
х=-5
-6x-6=-3
-6x=-3+6
-6x=3
x=3/-6
х=-0,5
-7x-3=11
-7x=11+3
-7x=14
x=14/-7
х=-2