1. 4x-4-3 = -x-7+8
4x+x = -7+8+4+3
5x = 8
x = 8/5
x= 1.6
2.-10y+2=15-7x+14
-10y+2=-7x+29
-10y+2+7x-29=0
-10y+7x-27=0
3.12+4х-12-2х=5-3х+9
2х=14-3х
2х+3х=-14
5х=-14
х=-14/5
х=2,8
1. 4x-4-3 = -x-7+8
4x+x = -7+8+4+3
5x = 8
x = 8/5
x= 1.6
2.-10y+2=15-7x+14
-10y+2=-7x+29
-10y+2+7x-29=0
-10y+7x-27=0
3.12+4х-12-2х=5-3х+9
2х=14-3х
2х+3х=-14
5х=-14
х=-14/5
х=2,8