已知方程组{X+Y-7Z=0(1)3X-2Y-Z=0(2)且Z不等于0求X:Y: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
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
已知方程组2x-3y+z=0 3x-2y-6z=0 且xyz不等于0求 x:y:z
已知方程组x-3y-2z=0,2x-y+z=0,且xyz不等于0,求x:y:z.
已知xyz不等于0,且x+2y-z=0,7x-y-z=0,求x+y+z/2x-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
已知方程组{x+y-7z=0,3x-2y-z=0,且z≠0,求X:Y:Z
快已知方程组;x+y-7z=0 3x-2y-z=0,且z≠0,求x:y:z加减消元法
已知方程组4X-3Y-3Z=0,X-3Y+Z=0,且Z不等于0,求X比Y比Z=?
已知x,y,z满足方程组x-2y+z=0 7x+4y-5z=0,且z不等于0,2x²-3y²+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x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值