x+2y+3z=2,3x+y+2z=3,2x+3y+z=4,求x+y+z的值
问题描述:
x+2y+3z=2,3x+y+2z=3,2x+3y+z=4,求x+y+z的值
答
x+2y+3z=2
3x+y+2z=3
2x+3y+z=4
3式相加
6x+6y+6z=9
x+y+z=2/3过程详细点