|x+1|+|y-2|+|z+3|=0 求 x y z

如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y, 如果,根号x-3+| y-2 |+z^2=2z-1 求 （x+z)^y |X-3|+| Y-2|+|Z-1|=0,求3x+2y +Z的值 |x+1|+|y-2|+|z+3|=0 求 x y z 1.已知x,y,z满足2│x-y│+(根号2y-z)+z平方-z+(1/4)=0,求x,y,z值. 设函数z=z(x,y)由方程x^2+y^3-xyz^1=0确定,求z/x,z/y 已知 3x-y+2z=0 2x+y-3z=0,求x :y :z. 设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值 x^2+y^2+z^2+4x+4y+4z+1=0,求x+y+z x^2+y^2+z^2+4x+4y+4z+1=0求x+y+z x^2+y^2+z^2+4x+4y+4z+1=0 求x+y+z 若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值