18+3х=х+14
3х-х=14-18
2х=-4
х=-2
25-4х=12-5х
-4х+5х=12-25
х=-13
13х+27=16х+4.5
-3х=-22.5
х=7.5
21х+45=17+14х
7х=-28
х=-4
13х+70=2х+15
11х=-55
х=-5
3.4х-4=4.8-х
4.4х=8.8
х=2
2х+7=х+5.5
х=-1.5
5-3х=2х-8
5х=13
х=2.6
9.5х+2=5.7х-5.6
3.8х=-7.6
х=-2
1.5х+8=3.1х+16
1.6х=-2
х=-1.25
2.9х+7.4=х+1.7
1.9х==-5.7
х=-3