題目誤導人~
) v+ u" h5 ~; ^4 s8 n% c4 downer 100
. q9 E5 V* b* p3 o, M7 wowner's son 20
8 T+ O2 b# M6 \) x6 i2 S/ N0 B公仔箱論壇each pay 40
- i. n1 ^8 w" K, A% A40*3 = 120
3 F5 ~# k: j+ s% v0 c" |; L0 otvb now,tvbnow,bttvb120(3 guys) - 20(owner's son) = 100 (owner) |