若x+y+z≠0且2y+z/x=2x+y/z=2z+x/y=k,则k=?

若x+y+z≠0且2y+z/x=2x+y/z=2z+x/y=k,则k=? 若xyz≠0且4(x/z)-5(y/z)=-2,(x/z)+4(y/z)=3,求x:y:z 已知 (x+y-z)/z=(x-y+z)/y=(y+z-x)/x,且xyz≠0,求代数式 ((x+y)(y+z)(x+z))/xyz 如果x+y=2z,且x≠y,那么x/x-z+y/y-z等于多少 如果x+y=2z,且x≠y,那么x/(x-z)+y/(y-z)等于( )急 如果x+y=2z,且x≠y,那么x/x-z+y/y-z等于多少 若z≠0,且4x=7y+5z,2x+y=z,求x,y,z的值 若x、y、z均不等于0,且2x+y-z=0 x+8y+2z=0,则x:y:z=? 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 若(4x-3y-3z)^2+|x-3y-z|=0 且xyz不等于0 则4x+y-z/x+y+z 的值 三元一次方程组题目x+y-z=11 y+z-x=5 x-y+z=1x+y=4 y+z=3 x+z=5若已知x-3y+2z=0 2x+3y-8z=0, 且xyz≠0,则x:y:z= 已知：x^2/(z+y)+y^2/(x+z)+z^2/(x+y)=0,求x/(z+y)+y/(x+z)+z/(x+y)的值. x^2/(z+y)+y^2/(x+z)+z^2/(x+y)=0,求x/(z+y)+y/(x+z)+z/(x+y)的值 已知：(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)]/xyz的值已知：(x+y-z)/z=(x-y+z)/y=(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)]/xyz的值 题目中写错个等号，汗... 若xy-z=0,且(y+x)/x=(z+x)/y=(y+x)/z,求[(y+z)(z+x)(x+y)]/xyz的值? 若xy-z不等于0,且(y+x)/x=(z+x)/y=(y+x)/z,求[(y+z)(z+x)(x+y)]/xyz的值? 若x,y,z满足x/(y+z)=y/(x+z)=z/(x+y)=k,且x+y+z≠0,求k和x/(x+y+z)