1) -х+7 = 6х;
-х-6х = -7;
-7х = 7;
х = -7:(-7);
х=1.
2) -7х+8 = 9х;
-7х-9х = -8;
-16х = -8;
х = -8:(-16);
х = 0,5.
3) -х+2 = 4х;
-х-4х = -2;
-5х = -2;
х = -2:(-5);
х = 0,4.
4) -9х-8 = -8х;
-9х+8х = 8;
-х = 8;
х = -8.
5) -х-7 = -5х;
-х+5х = 7;
4х = 7;
х = 7: 4;
х = 1,75.
6) -5х+2 = -10х;
-5х+10х = -2;
5х = -2;
х = -2:5;
х = -0,4.
7) -2х+3=-8х;
-2х+8х = -3;
6х = -3;
х = -3:6;
х = -0,5.
8) -4х=-10х-9;
-4х+10х = -9;
6х = -9;
х = -9:6;
х = -1,5.
9) 6+3х = 4х-1;
3х-4х = -1-6;
-х = -7;
х = 7.
10) -1+2х = 10х+3;
2х-10х = 3+1;
-8х = 4;
х = 4:(-8);
х = -0,5.
11) -4+3х = 8х+5;
3х-8х = 5+4;
-5х = 9;
х = 9:(-5);
х = 1,8.
12) 9+4х = 8х-9;
4х-8х = -9-9;
-4х = -18;
х = -18:(-4);
х = 4,5.
13) 2+8х = 3х+9;
8х-3х = 9-2;
5х = 7;
х = 7:5;
х = 1,4.
14) 6-2х = 3х-10;
-2х-3х = -10-6;
-5х = -16;
х = -16:(-5);
х = 3,2.