已知:4X-3y=0,X+2y-7Z=0(xyz不等于0),求x+5y+7分之x+3y+6z.
已知:4x-3y-6z=0,x+2y-7z=0(xyz不等于0),求x+5y+7z分之2x+3y的值
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z
已知5分之x+y=6分之Y+Z=7分之Z+X,且XYZ不等于0,求X:Y:Z
已知:4X-3y=0,X+2y-7Z=0(xyz不等于0),求x+5y+7分之x+3y+6z.
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4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z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
已知2X+5Y+4Z=0,3X+Y-7Z=0,且XYZ不等于0,求(X+Y+Z)/(2X-3Y+4Z)的值
已知;4x-3y-6z=0,x+2y-7y=0(xyz不等于0),求2x+3y+6z/x+5y+7z的值
已知xy/5=y+z/6=z+x/7,且xyz不等于0,求x:y:z
已知{4x-5y 2z=0/x 4y-3x=0(xyz不等于0),求x:y:z:d的值
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.