x+2y+3z=12x+3y+z=23x+y+2z=3.

问题描述:

x+2y+3z=1
2x+3y+z=2
3x+y+2z=3

x+2y+3z=1            ①2x+3y+z=2              ②3x+y+2z=3 &nbs...