xyz满足4x-7y-5z=0,2x-y-z=0,求x/y
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
已知xyz满足x-2y+z=0 7x+4y-5z=0,求y+z分之x的值
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
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
已知有理数x.y.z满足(x-z-2)^2+(3x-6y-7)^2=/3y+3z-4/=0求xyz=多少
已知xyz满足方程组x+4y-3z=0,求x:y:z的值 4x-5y+2z=0
已知有理数x,y,z满足(x-z-2)^2+(3x-6y-7)^2+|3y+3z-4|=0求xyz的值
已知XYZ满足方程组 X+Y-Z=6 Y+Z-X=2 Z+X-y=0 求X Y Z的值
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满足|3x-2y+z|+|2x+y+2z|=0(xyz不等于o)求x+y除以z
已知xyz满足x-2y+3z=0,2x-3y+4z=0,求x:y:z
数学已知xyz满足x-2y+3z=0,2x+3y+4z=0,求x:y:z