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thao8a99
2 năm trước
tìm số hs của 2 lớp 8A và 8B biết rằng nếu chuyển 3 hs từ lớp 8A sang lớp 8B thì số hs 2 lớp bằng nhau , nếu chuyển 5 hs từ lớp 8B sang lớp 8A thì số hs 8b =11/19 số hs lớp 8A
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