已知x^2+y^2+z^2-2x+4y-6z+14+0,求x+y+z的值

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 已知x²+y²+z²-2x+4y-6z+14=0,求x+y-z/x+y+z的值 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 已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值 已知x/4=y/5=z/6,求x+y+z/3x-2y+z的值. 已知4x-3y-6y=0,x+2y-7z=0.求x-y+z\x+y+z的值 已知x:：y：z=3：4：5,(1)求x+y分之z的值；（2）若x+y+z=6,求x,y,z. 已知2x+2y-4z=0,2x+4y+5z=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x.y.z满足方程组x+2y-4z=0 2x+y-5z=0 求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