解方程组2x-y+2z=6 3x+y-3z=-4 x+y+z=6

3x-y+z=3,2x+3y-z=12,x+y+z=6解方程组 解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组2x+3y-z=12,3x-y+z=4,x+y+z=6 解方程组x+y+z=6 x+2y-3z=4 2x-y+z=5 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 解方程组2x=3y=6z,x+2y+z=16 解方程组{6x=4y=3z,2x+y+z=22 解三元一次方程组：x+y+z=6,y-z=4,x-y-2z=3, 解方程组,｛x+y+3=-6,2x-y+3z=-9.3x+2y-z=-4 解方程组 x+y-z=6 〈1〉{x-3y+2z=1解方程组 x+y-z=6 〈1〉{x-3y+2z=1 3x+y-z=4 方程组3x+y+z=4,2x+3y-z=12,x+y+z=6解这个方程组要过程 解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3 解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=3 解方程组 :X+Y-3Z=1 Y+Z-3X=2 Z+X-3Y=3 解方程组：2x+y+z=-4 x+2y+z=-2 x+y+2z=3 解方程组 x+y+z=2 x-2y+z=-1 x+2y+3z=-1 解方程组：x-2y+z=-1,x+y+z=2,x+2y+3z=-1