Question 151387
5x+3y+z=0
x-3y+2z=9
14x-2y+3z=11

5x+3y+z=0
9x+9y=-9
x+11y=-11

x+y=-1
x+11y=-11

x=-1-y

-1-y+11y=-11

10y=-10

y=-1

x=0

z=3

solution: (0,-1,3)