Question
There were some cards in Bag T and Bag U. After Reggie transferred 15 of the cards from Bag T to Bag U, the ratio of the number of cards in Bag T to that in Bag U changed to 1 : 5. Find the ratio of the numbers of cards in Bag U to the number of cards in Bag T at first.
3 m

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There were some cards in Bag T and Bag U. After Reggie transferred 15 of the cards from Bag T to Bag U, the ratio of the number of cards in Bag T to that in Bag U changed to 1 : 5. Find the ratio of the numbers of cards in Bag U to the number of cards in Bag T at first.