Question
There were some cards in Packet L and Packet M. After Peter transferred 14 of the cards from Packet L to Packet M, the ratio of the number of cards in Packet L to that in Packet M changed to 2 : 5. Find the ratio of the numbers of cards in Packet L to the number of cards in Packet M at first.
3 m

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There were some cards in Packet L and Packet M. After Peter transferred 14 of the cards from Packet L to Packet M, the ratio of the number of cards in Packet L to that in Packet M changed to 2 : 5. Find the ratio of the numbers of cards in Packet L to the number of cards in Packet M at first.