来自田宝仁的问题
求满足下列条件的所有正整数解3x+2y-z=4,2x-y+2z=6,x+y+z<7
求满足下列条件的所有正整数解3x+2y-z=4,2x-y+2z=6,x+y+z<7
1回答
2020-03-22 16:53
求满足下列条件的所有正整数解3x+2y-z=4,2x-y+2z=6,x+y+z<7
求满足下列条件的所有正整数解3x+2y-z=4,2x-y+2z=6,x+y+z<7
3x+2y-z=4(1)
2x-y+2z=6(2)
(1)×2+(2)
8x+3y=14
y=(14-8x)/3>0
14-8x>0
x0
16-7x>0
x