方程x-2y+3z+0 2x-3y+4z=0 ,则 x:y:z的值?
已知x,y,z,同时满足方程x+3y-5z=0,2x-y-3z=0求x:y:z的值
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
已知{3x+4y+5z=0,2x+3y-4z=0,求x+y+z/x-y+z的值.
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/x-y+z的值.
2x+3y-4z=0,3x+4y+5z=0,求x+y-z/x-y+z的值
已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
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
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+2z=0,x+4Y-9/2z=0求:X:Z的值.X:y:Z的值.X+2y+X/X+y+Z的值. 已知: