3х + 5 = 2х + 7
3х-2х=7-5
х=2
4х - 27 + 3х - 14 = 8
4х+3х=8+14+27
7х=49
х=7
9(-4 + 2х) = 24 + 8х
-36+18х=24+8х
18х-8х=24+36
10х=50
х=5
4х - 7 = - х + 18
4х+х=18+7
5х=25
х=5
3,2(х - 3) + 1,2(2х + 8) = 0
3,2х-9,6+2,4х+9,6=0
3,2х+2,4х=0+9,6-9,6
5,7х=0
х=0
