{4x+y-3z=-4{2x-3y+z=2{x+5y-4z=-5

Question

{4x+y-3z=-4
{2x-3y+z=2
{x+5y-4z=-5

Answer 1

4(-5-y)+y-3(12+5y)+4=0
2y-56+4=0
2y=52
y=26
z=12+5y z=12+130=142
x=-5-y x=-31