若x-2y+4z=0,x+3y-7z=0,则3x-y+z的值是
4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
若{x+3y+10z=0 则 (x+y-z)/(x-y+z)
若x-2y+4z=1,x+3y-7z=0,则y:z=?
已知x^3+y^3-6x+2y+z+3+10=0,求(x-y+z)(x+y-z)的值.(z+3)是绝对值
已知4x-3y-6y=0,x+2y-7z=0.求x-y+z\x+y+z的值
方程组{4x-3y-3z=0,x-3y+z=0,(x.y.z不等于0),求x/z和y/z的值?
4x-3y-3z=0 x-3y+z=0 并且X Y Z不等于0 求x:z 和y:z的值
2x+5y+4z=0,3x+y-7z=0,则x+y-z=?
若2x+5y+4z=0,3x+y-7z=0,则x+y-z的值等于( )
若2x+5y-4z=0,3x+9y-7z=0,则x+y-z的值为