題目誤導人~5.39.217.77:8898 w" _7 N3 e' {9 G
owner 100
' [# G' z0 @7 e/ o9 ^tvb now,tvbnow,bttvbowner's son 20
+ w. ~) S2 k$ R) ~2 v" c) R5.39.217.77:8898each pay 40
1 V8 t5 V/ I o9 p# y/ n+ F40*3 = 120tvb now,tvbnow,bttvb( n. X# c B2 h `$ D/ S" ^
120(3 guys) - 20(owner's son) = 100 (owner) |