若x/2=y/3=z/4不等于0,则2x+3y/z=()
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
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
若5分之x=4分之y=3分之z(z不等于0),则3x-2y分之x+y+z的值为
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满足{4x-3y-3z=0,x-3y+z=0.(x不等于0,y不等于0,z不等于0)求x/z和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x/3=y/5=z/7不等于0,则2x+3y+4z/5x-3y+z=?
若xyz不等于0,且|2x+3y-z|+(3x-y-z)^=0,则代数式z分之x+y=
若xyz不等于0,且{4x-5y+2z=0,x+4y-3z=0,求x:y:z
已知方程组4x-y+3z=0,2x+y+6z=0.且xyz不等于0,则x:y:z=