|x+y+4|+(x-2)²=0则3z+2y=
x-3y+z=0,3x-2y-4z=0,则x:y:z=多少?
已知{x-3y+2z=0 3x-3y-4z+0,则x:y:z=?
2x+5y+4z=0,3x+y-7z=0,则x+y-z=?
x+2y-4z=0 3x+y-z=0,则x:y:z=
x+2y-4z=0,3x+y-z=0,则x:y:z=?::
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z都不为0,求(3x*x+y*y+4z*z)/(5x*x+y*
已知x+2y-4z=0,3x-y-z=0,则3x+2y+z/x+2y+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
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=——