1) 2(х+3)=х+8
2x+6=x+8
2x-x=8-6
x=2
2) 5/6х+8=1/4х-6
5/6х-1/4х=-6-8
10/12х-3/12х=-14
7/12x=-14;
х=-14*12/7;
х=-24
3) 1/2х+1/6х=х-3
(1/2)х + (1/6)х = х - 3
Приводим обе части уравнения к общему знаменателю 6
3х+х=(х-3)·6
4х=6х-18
4х-6х=-18
-2х=-18
x=-18:(-2)
х=9
4) 11/18x-2/9=5/12х+1(1/3);
11/18х-5/12х=1(1/3)+2/9;
22/36х-15/36х=1(3/9)+2/9;
7/36х=1(5/9);
х=14/9*36/7
x=8
1) 2(х+3)=х+8
2x+6=x+8
2x-x=8-6
x=2
2) 5/6х+8=1/4х-6
5/6х-1/4х=-6-8
10/12х-3/12х=-14
7/12x=-14;
х=-14*12/7;
х=-24
3) 1/2х+1/6х=х-3
(1/2)х + (1/6)х = х - 3
Приводим обе части уравнения к общему знаменателю 6
3х+х=(х-3)·6
4х=6х-18
4х-6х=-18
-2х=-18
x=-18:(-2)
х=9
4) 11/18x-2/9=5/12х+1(1/3);
11/18х-5/12х=1(1/3)+2/9;
22/36х-15/36х=1(3/9)+2/9;
7/36х=1(5/9);
х=14/9*36/7
x=8