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hoangsang
2 năm trước
Ba bạn Toán, Tuổi và Thơ có một số vở. Nếu lấy 40% số vở củaToán chia đều cho Tuổi và Thơ thì số vở của ba bạn bằng nhau. Nhưng nếu Toánbớt đi 5 quyển thì số vở của Toán bằng tổng số vở của Tuổi và Thơ. Hỏi mỗi bạncó bao nhiêu quyển vở ?
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