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tranlinh02
2 năm trước
giúp em với ạ: Cửa hàng bán lần thứ nhất được 1/3 số thóctrong kho, bán lần thứ hai được 1/3 số thóc còn lại sau khi bán lần đầu, bán lần thứ ba được 1/3 số thóc còn lại sau khi bán lần thứ hai .Sau ba lần bán, trong kho còn lại 40 tạ thóc . Tính số thóc trong kho lúc đầu.
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