4x-5z=y-x+6z=x+y+z xyz≠0 求x∶y∶z的值结果是.5:3:2请问过程怎么写
4x-5z=y-x+6z=x+y+z xyz≠0 求x∶y∶z的值结果是.5:3:2请问过程怎么写
已知xyz≠0,且x+3y+z=0,2x+3y-z=0 ,求x+2y-7z /3x+5y+z的值?
4x-3y-6z=0,x+2y-7z=0,xyz的积不等于0,求(x+y-z)/(x-y+2z)的值
已知x/2=y/3=z/4,xyz≠0,求3x/2x+3y-5z的值.
已知4x-5z=y-x+6z=x+y+z,xyz不等于0,求x:y:z
已知 xyz≠0,且x+3y+z=0,2x+3y-z=0,求x+2y-7z/3x+5y+z 的值..
若4x-3y-6z=0,x+2y-7z=0且xyz≠0; 求(2x+3y+6z)/(x+5y+7z)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xyz满足方程组x+4y-3z=0,求x:y:z的值 4x-5y+2z=0
已知xyz都不为零,且方程组4x-3y-3z=0,x-3y+z=0求x:y:z
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