若4x-3y-6z=0,x 2y-7z=o(xyz≠0),求
4X—3Y—6Z=0 X+2Y—7Z=O(XYZ不等于0)求代数式X-y+z除以x+y+z的值
已知xyz满足|3x-2y+z|+|2x+y+2z|=0(xyz不等于o)求x+y除以z
若4x-3y-6z=0,x+2y-7z=0(xyz≠0),则x:y:z=______.
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
已知一方程组:x-3y+7z=0与x-2y+4z=0(xyz≠0),求x:y:z.
若4x-3y-6z=0,x+2y-7z=0且xyz≠0; 求(2x+3y+6z)/(x+5y+7z)的值?
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
已知2x-3y+z=o,3x-2y-6z=0,xyz≠0,求x^2+y^2+z^2/2x^2+y^2-z^2的值
1.已知 x-3y+7z=0,x-2y+4z=0.(xyz≠0),求 x:y:z
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:(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)