2x+3y+z=11,x+y+z=6,3x-y-z=-2求解

2025-04-24 17:57:34
推荐回答(1个)
回答1:

2x+3y+z=11,.①
x+y+z=6,.②
3x-y-z=-2.③
①+③
5x+2y=9.④
②+③
4x=4
x=1
代入④
5+2y=9
y=2
代入②
z=3
x=1,y=2,z=3