Question
There were some cards in Bag F and Bag G. After Seth transferred 15 of the cards from Bag F to Bag G, the ratio of the number of cards in Bag F to that in Bag G changed to 3 : 4. Find the ratio of the numbers of cards in Bag F to the number of cards in Bag G at first.
3 m

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There were some cards in Bag F and Bag G. After Seth transferred 15 of the cards from Bag F to Bag G, the ratio of the number of cards in Bag F to that in Bag G changed to 3 : 4. Find the ratio of the numbers of cards in Bag F to the number of cards in Bag G at first.