解下面三元一次方程组
9x-5y+z=5
9x+y+4x=14
-9x+3y-5z=-11
3x-5y+2z=1
4x+5y-z=5
x-5y+3z=-2
4x+3y-2z=-7
5x-6y+z=-2
2x+z=-2
5x-3y+6z=-3
2x-y+3z=0
y+3z=6
3x+2y2x+yx-y+1
----------=-----
456