Question

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

Answer 1

3(х-2)+5х=18
3х-6+5х=18
8х=24
х=3

4(х-1)-11х=17
4х-4-11х=17
-7х=21
х= - 21:7
х= - 3

4х+2(1-х)=13
4х+2-2х=13
2х=11
х=11 :2
х=5 1/2
5(1+2х)-(2х-1)=7
5+10х-2х+1=7
8х=1
х=1/8

18-3(1+х)=3
18-3-3х=3
-3х= - 12
х=12:3
х=4