已知xyz不等于0,且{x+3y+5z=0 x2+3y+z=0,则x.x+y.y-2z.2z/3x.3x+2y.2y+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
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xyz不等于0,且x/3=y/4=z/5,求【2x-3(2y-z)】/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x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
已知x+4y-3z=0,4x-5y+2z=0(xyz不等于0),则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x/2=y/3=z/4且xyz不等于0,求2x+3y-z/x-3y+z拜托各位了 3Q
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xyz不等于0,且2x-y+z=0,x-2y+3z=0,求代数式