已知x+y+z不等于0,若2y+z/x=2x+y/z=2z+x/y=k,则k=

已知x+y+z不等于0,若2y+z/x=2x+y/z=2z+x/y=k,则k= 若x+y+z不等于0且2y+z/x=2x+y/z=2z+x/y=k,k=? 若x+y+z不等于0 且 2y+z/x=2x+y/z=2z+x/y=k 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+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 若有xyz≠0,2y+2z/x=2x+2y/z=2z+2x/y=k,则K= 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/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值 若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值 已知:(x+y)/z=(x+z)/y=(z+y)/x,且xyz不等于0,则分式(x+y)(x+z)(z+x)/xyz的值