1.3(х-2)+5х=18
2.4(х-1)-11х=17
3.4х+2(1-х)=13
4.5(1+2х)-(2х-1)=7
5.18-3(1+х)=3

3(х-2)+5х=183х-6+5х=188х=24х=34(х-1)-11х=174х-4-11х=17-7х=21х= - 21:7х= - 34х+2(1-х)=134х+2-2х=132х=11х=11 :2х=5 1/25(1+2х)-(2х-1)=75+10х-2х+1=78х=1х=1/818-3(1+х)=318-3-3х=3-3х= - 12х=12:3х=4