-1-8х= -10х+3
-8х+10х=3+1
2х=4
х=2
.................
7-6х= -4х-6
-6х+4х= -6-7
- 2х= - 13х
х=(-13):(-2)
х=6,5
................
-7х-7=4-8х
-7х+8х=4+7
х=11
........................
9-4х= -9х-4
-4х+9х= -4-9
5х= -13
х=(-13):5
х= -2,6
...................
3-4х= -8х+9
-4х+8х=9-3
4х=6
х=1,5
..................
2(х-7)=3
2х-14=3
2х=3+14
2х=17
х=8,5