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kkaix060
2 năm trước
Hai thùng đựng 154 lít dầu. Nếu rót 15 lít tù thùng thứ nhất sang thùng thứ hai thì số dầu ở thùng thứ hai bằng 4/3 số dầu ở thùng thứ nhất. Tìm số dầu ở mỗi thùng lúc đầu
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