如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,

如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y, 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 如果,根号x-3+| y-2 |+z^2=2z-1 求 （x+z)^y x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少, x+y-z=6 x-3y+2z=0 3x+2y-z=0 求x、y、z 要过程 已知有理数x,y,z满足|x-z-2|+|3x-6y-7|+(3y+3z-40)^2=0,求x,y,z的值 已知有理数x、y、z满足条件|x-z-2|+(3x-6y-7)^2+|3y+3z-4|=0,求x、y、z 已知x^3+y^3-6x+2y+z+3+10=0,求（x-y+z)(x+y-z)的值.（z+3)是绝对值 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 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 ①x+y+z=6 3x-y+2z=12 x-y-3z=-4 ②x+y-z=2 4x-2y+3y+8=0 x+3y-2z- 若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10