若x/3=y/4=z/5(xyz≠0),则x+y+z/2x=多少
若4x-3y-6z=0,x+2y-7z=0(xyz≠0),则x:y:z=______.
已知2x-4y-5z=0,-3x+y+4z=0,(xyz≠0)则x:y:z=________
已知2x-4y-5z=0,-3x+y+4z=0 (xyz≠0)则x/y/z=?
若x+y除以3=y+z除以5=z+x除以4,且xyz≠0,则x:y:z=?
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
1.若4x-3y-6z=o,x=2y-7z=0 (xyz ≠0)则 、(5x的平方+2y的平方-z的平方) 除以 (2x
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?
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
已知一方程组:x-3y+7z=0与x-2y+4z=0(xyz≠0),求x:y:z.
(x-3y+z)^2+/ 5x-4y+z/=0 且xyz≠0 xy+yz+zx/x^2+y^2+z^2