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2023-11-26 10:53:21
Cho hai thùng dầu, thùng thứ nhất đựng nhiều hơn thùng thứ hai 47 lít. Sau khi lấy ở thùng thứ nhất ra 8 lít dầu thì số dầu ở thùng thứ hai bằng 2/5 số dầu còn lại ở thùng thứ nhất. Hỏi lúc đầu mỗi thùng đựng bao nhiêu lít dầu?