解下面三元一次方程组(1)9x-5y+z=5 (2)3x-5y+2z=19x+y+4x=14 4x+5y-z=5-9x+
解下面三元一次方程组
(1)9x-5y+z=5 (2)3x-5y+2z=1
9x+y+4x=14 4x+5y-z=5
-9x+3y-5z=-11 x-5y+3z=-2
(3)4x+3y-2z=-7 (4)5x-3y+6z=-3
5x-6y+z=-2 2x-y+3z=0
2x+z=-2 y+3z=6
(5)3x+2y 2x+y x-y+1
----- - ---- = -----
4 5 6