3(х-1)+х=2х
3х-3+х=2х
3х+х-2х=3
2х=3
х=2/3
5(х+4)+х=6
5х+20+х=6
5х+х=6-20
6х=-14
х= -2 2/6= -2 1/3
3(х+4)=5х-7
3х+12=5х-7
3х-5х= -7-12
-2х= -19
х= 19/2 = 9,5
2(х-5)=7
2х-10=7
2х=7+10
2х=17
х=17/2=8,5
12+3(х-1)=0
12+3х-1 = 0
3х=1-12
3х= - 11
х= - 11/3 = - 3 2/3
3(х-7)-6х=--х
3х-21-6х= -х
3х-6х+х=21
-2х=21
х=- 21/2 = - 10,5
2(х+3/5) - х = 3 1/5
2х+ 6/5 - х = 3 1/5
2х - х = 3 1/5 - 6/5
х= 2
3(х-1)+х=2х
3х-3+х=2х
3х+х-2х=3
2х=3
х=2/3
5(х+4)+х=6
5х+20+х=6
5х+х=6-20
6х=-14
х= -2 2/6= -2 1/3
3(х+4)=5х-7
3х+12=5х-7
3х-5х= -7-12
-2х= -19
х= 19/2 = 9,5
2(х-5)=7
2х-10=7
2х=7+10
2х=17
х=17/2=8,5
12+3(х-1)=0
12+3х-1 = 0
3х=1-12
3х= - 11
х= - 11/3 = - 3 2/3
3(х-7)-6х=--х
3х-21-6х= -х
3х-6х+х=21
-2х=21
х=- 21/2 = - 10,5
2(х+3/5) - х = 3 1/5
2х+ 6/5 - х = 3 1/5
2х - х = 3 1/5 - 6/5
х= 2