已知2x-4y-5z=0,-3x+y+4z=0,(xyz≠0)则x:y:z=________
已知2x-4y-5z=0,-3x+y+4z=0,(xyz≠0)则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2x-4y-5z=0,-3x+y+4z=0 (xyz≠0)则x/y/z=?
已知:(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)
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+y)/z=(x+z)/y=(z+y)/x,且xyz不等于0,则分式(x+y)(x+z)(z+x)/xyz的值
已知一方程组:x-3y+7z=0与x-2y+4z=0(xyz≠0),求x:y:z.
已知x+4y-3z=0,4x-5y+2z=0(xyz不等于0),则x:y:z=?
已知有理数x,y,z满足条件:|x-z-2|+|3x-6y-7|+(3y+3z-4)^2=0,则xyz=?
已知4x-5z=y-x+6z=x+y+z,xyz≠0,求x:y::z
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z