(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=?
(2x+y)/z=(2y+z)/x=(2z+x)/7=k,求k
若x+y+z不等于0 且 2y+z/x=2x+y/z=2z+x/y=k
若有xyz≠0,2y+2z/x=2x+2y/z=2z+2x/y=k,则K=
2y+z分之x = 2x+y分之z=2z+x分之y=k,则k=
x+y=3k y+x=5k z+x=4k x-2y+3z=-6 k的值是多少
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知x分之2y+2z=y分之2x+2z=z分之2x+2y=k求k的值
已知x+y/2=y+z/3=z-2x/4=k,且知道x+2y-z=9,求k的值
x+2y-z=12 x/2=y/3+z/2=k 求k值
x+2y-z=12,且x/2=y/3+z/2=k 求k值