Question

2х+5х+х=-1
2х+4х+х+х=0
3х+2х+х=5

Answer 1

2х+5х+х=-1
8х=-1
х=-1/8
х=-0.125

2х+4х+х+х=0
8х=0
х=0

3х+2х+х=5
6х=5
х=5/6

Answer 2

8х=-1
х=-1/8

8х=0
х=0

6х=5
х=5/6