題目誤導人~
/ c8 u I3 u4 \% r" Ftvb now,tvbnow,bttvbowner 100公仔箱論壇5 h) r8 m# h, |$ g" V
owner's son 20
6 |1 O* M, x5 f3 u9 neach pay 40
3 M5 j0 K& b2 c1 v( c40*3 = 120
! J6 [: `- g- D+ {5 E3 j1 ntvb now,tvbnow,bttvb120(3 guys) - 20(owner's son) = 100 (owner) |