已知3X=2Y=5Z不等于0,求求X-Y+Z分之X+2Y+3Z的值

已知3X=2Y=5Z不等于0,求求X-Y+Z分之X+2Y+3Z的值 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.z=? 已知x/1=y/3=z/5(x不等于0),求(x+3y-z)/(x-3y+2z)的值. 已知x+y-7z=0 x-2y+5z=0(xyz不等于0）,求x+2y-z/y-2x+12z 已知方程组{2x-3y+z=0 且x*y*z不等于0 求 x：y：z {3x-2y-6z=0 已知2x-y-3z=0 x-2y+z=0,且x、y、z都不等于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/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,y,z满足方程组x-2y+z=0 7x+4y-5z=0,且z不等于0,2x²-3y²+z²/y²-2z²的值为? 已知z不等于0,x、y、z满足4x-7y-5x=0,2x-y-z=0.求x：y 已知x/3=y/5=z/7不等于0,则2x+3y+4z/5x-3y+z=? 已知X+4Y-3Z=0,4X-5Y+2Z=0(XYZ不等于0) 则X:Y:Z=_____ 已知x+4y-3z=0,4x-5y+2z=0(xyz不等于0),则x:y:z=? 已知4x-5y+2z=0,x+4y-3z=0 且xyz不等于0,求x:y:z的值. 已知xyz不等于0,且x/3=y/4=z/5,求【2x-3(2y-z)】/x+y+z 已知x/3=y/5=z/7不等于0,则x-y+z/y=?