x+2y-z=-5 x+y+2z=-1 3x+4y-2z=-12x+2y-z=3 2x+y+3z=0 4x+z=-4
问题描述:
x+2y-z=-5 x+y+2z=-1 3x+4y-2z=-12
x+2y-z=3 2x+y+3z=0 4x+z=-4
答
x+2y-z=-5 x+y+2z=-1 3x+4y-2z=-12
x+2y-z=3 2x+y+3z=0 4x+z=-4