1)3х-3-2х-4=4х+8
х-7=4х+8
х-4х=8+7
3х=15
х=15:3
х=5
2)4х+6+3-3х=10
х+9=10
х=10-9
х=1
3)12х+8-7х-7=3х-3
5х+1=3х-3
5х-3х=-3-1
2х=-2
х=-2:2
х=-1
4)5х+7,5-2х-5=3,5+2х
3х+2,5=3,5+2х
3х-2х=3,5-2,5
1)3х-3-2х-4=4х+8
х-7=4х+8
х-4х=8+7
3х=15
х=15:3
х=5
2)4х+6+3-3х=10
х+9=10
х=10-9
х=1
3)12х+8-7х-7=3х-3
5х+1=3х-3
5х-3х=-3-1
2х=-2
х=-2:2
х=-1
4)5х+7,5-2х-5=3,5+2х
3х+2,5=3,5+2х
3х-2х=3,5-2,5
х=1