已知x,y,z满足|x-2-z|+（3x-6y-7）2+|3y+3z-4|=0．求x,y,z的值．计算过程、初一的、谢谢啦啦

已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知z、y、z同时满足x+3y-5z=0,2x-y-3z=0,求x:y:z 已知正数x,y,z满足x+2y+3z=1,求最小值 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 已知实数x,y,z满足x+y+z=2根号x-1+2根号y-1+2根号z-1求X+2Y+3Z 已知实数xyz满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3求x+y+z的值 已知x,y,z,同时满足方程x+3y-5z=0,2x-y-3z=0求x：y：z的值 已知x,y,z,满足2/x=3/(y-z)=5/(z+x),则(5x-y)/(y+2z)的值为多少? 已知实数x,y,z满足关系式2x-3y-z=0,x-2y+z=0,求x比y比z的值 已知实数 x y z 满足x+y-z=0 ,3x-y+2z=0 则x :y :z 已知x,y,z均为整数并满足{|x+y|+|y+z|+|z+x|=2} {|x-y|+|y-z|+|z-x|=2} 求x+y^2+z^3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.Y.Z满足方程组,X+y-Z=6y+z-x=2z+x-y=0求X.Y.Z的值 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 已知有理数x,y,z满足 (x-1)(x-1)+|2x-y|+|x-3z|=0 求x+y+z的值,要过程! 已知有理数x,y,z满足 (x-1)(x-1)+|2x-y|+|x-3z|=0 求x+y+z的值