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Mathematics
Junior High
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這題怎麼算

説三句以 句品 性 問或語句 件品 數解的應用(II) 即時演練4 美術館的門票,大人每張250元,小孩每 張100元,規定20人以上打8折。已知 瑞凡一行人共有大人8人,小孩若干人, 但總人數仍不到20人,則當小孩幾人以上 時,買20張門票反而比較便宜? 留 令小孩 250×8+100x20x
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