若xyz≠0且4x-5y=-2z,x+4y=3z,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)
若xyz不等于0,且{4x-5y+2z=0,x+4y-3z=0,求x:y:z
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xyz不等于0,且满足(y+z)/x=(x+z)/y=(x+y)/z,求(y+z)(x+z)(x+y)/xyz的值
若xyz不等于0,且(y+z)/x=(z+x)/y=(x+y)/z,求(y+z)(z+x)(x+y)/xyz的值?
x:y:z=2:3:4且x+y+z=18求xyz
若4x-3y-6z=0,x+2y-7z=0且xyz≠0; 求(2x+3y+6z)/(x+5y+7z)的值?
若1/2x=1/3y=1/4z且xyz不等于0,求x:y:z
若 x/2等于y/3等于z/4,且x+y-z=5 求xyz的值
已知xyz不等于0,且x/3=y/4=z/5,求【2x-3(2y-z)】/x+y+z
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?
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