hi guys i have a problem, i need resolve this linear system with gauss

x-5y+6z=-5
x-6y+5z=6
2x-11y+11z=1

i do the shits

1 -5 6 -5 1 -5 6 -5
0 -1 -1 11 => 0 -1 -1 11
0 -1 -1 11 0 0 0 0
i arrive here but then i don't know what to do, should i just find the solution like this? or i'm missing something? halp