Question

решите систему 

 {2х+3z=6

{3x+5z=8

 

Answer 1

3z+2x=6
5z+3x=8
x=6; z=-2 

Answer 2

{2х+3z=6

{3x+5z=8

 3z=6-2x

z=6-2x/3

3x+5(6-2x/3)=8

3x+30-10x/3=8

9x+30-10x/3=8

30-x/3=8

30-x=24

x=24-30=-6

z=6-2(-6)/3=6

        x=-6

z=6