7-3х=27-5х
-3х+5х=27-7
2х=20 (:2)
х=10
8х=42+х
8х-х=42
7х=42 (:7)
х=6
х-14=43-2х
х+2х=43+14
3х=60 (:3)
х=20
2(х-3)=99-3х
2х-6=99-3х
2х+3х=99+6
5х=105 (:5)
х=21
4-(2х+1)=22-3х
4-2х-1=22-3х
-2х+3х=22-4+1
х=19
7-3х=27-5х
-3х+5х=27-7
2х=20 (:2)
х=10
8х=42+х
8х-х=42
7х=42 (:7)
х=6
х-14=43-2х
х+2х=43+14
3х=60 (:3)
х=20
2(х-3)=99-3х
2х-6=99-3х
2х+3х=99+6
5х=105 (:5)
х=21
4-(2х+1)=22-3х
4-2х-1=22-3х
-2х+3х=22-4+1
х=19