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Mathematics
Junior High
墨萱( ˶ ❛ ꁞ ❛ ˶ )
墨萱( ˶ ❛ ꁞ ❛ ˶ )

❗❗🙏求解

學生練習 工程問題 有一工程,甲一人獨做比乙一人獨做晚15 天完工。若兩人共同合作,只要18天就師講 以完工,則甲、乙兩人獨做各需多少天完,牛 T2
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