方程组x-2y-3z=0 2x+y-2z=0 (xyz不等于0) 求x:y:z
方程组:x-2y+4z=0,2x+3y-3z=0...xyz不等于0,求(2x+y-z)\(2x-y+z)
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
方程组x-2y-3z=0 2x+y-2z=0 (xyz不等于0) 求x:y:z
已知方程组2x-3y+z=0 3x-2y-6z=0 且xyz不等于0求 x:y:z
已知方程组x-3y-2z=0,2x-y+z=0,且xyz不等于0,求x:y:z.
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
已知方程组4x-y+3z=0,2x+y+6z=0.且xyz不等于0,则x:y:z=
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z
已知xyz不等于0,且x+2y-z=0,7x-y-z=0,求x+y+z/2x-y-z的值.
已知xyz满足|3x-2y+z|+|2x+y+2z|=0(xyz不等于o)求x+y除以z
已知XYZ满足方程组 X+Y-Z=6 Y+Z-X=2 Z+X-y=0 求X Y Z的值