若4x-3y-6z=0,x+2y-7z=0(xyz=0),则代数式(5x^2+2y^2-z^2)/(2x^2-3y^2-
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
若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10
若xyz不等于0,且|2x+3y-z|+(3x-y-z)^=0,则代数式z分之x+y=
若4x-3y-6z=0,x+2y-7z=0(xyz≠0),则x:y:z=______.
方程组:x-2y+4z=0,2x+3y-3z=0...xyz不等于0,求(2x+y-z)\(2x-y+z)
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值
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
已知有理数x,y,z满足条件:|x-z-2|+|3x-6y-7|+(3y+3z-4)^2=0,则xyz=?
已知有理数x,y,z满足(x-z-2)²+(3x-6y-7)+|3y+3z-4|=0,则xyz=
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z