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phantrang
2 năm trước
Bài 4 (2.5đ) :Thùng dầu A chứa số dầu gấp 2 lần thùng dầu B. Nếu lấy bớt ở thùng A 9 lít, lấy bớt ở thùng B 3 lít thì số lít dầu ở thùng B gấp đói số lít dầu ở thùng A. Tính xem lúc đầu mỏi thùng có bao nhiêu lít. Mọi người giúp mình nhanh nhé mình đang cần gấp
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