題目誤導人~: W% e: H! I+ u5 ] 
owner 100 
' I5 u( I4 D: t  J3 q8 V7 G; `# y3 F5.39.217.77:8898owner's son 209 v  V, d, ]9 Y+ ~, ?. b$ A/ Y* i# x 
each pay 40 
) Y  A+ C6 r- h2 k' O$ Z: Y0 Stvb now,tvbnow,bttvb40*3 = 1205.39.217.77:88981 k9 X$ C0 W! m! Z4 c" v& a 
120(3 guys) - 20(owner's son) = 100 (owner) |