Question
There were some marbles in Bag X and Bag Y. After Pierre transferred 23 of the marbles from Bag X to Bag Y, the ratio of the number of marbles in Bag X to that in Bag Y changed to 3 : 7. Find the ratio of the numbers of marbles in Bag X to the number of marbles in Bag Y at first.
3 m

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There were some marbles in Bag X and Bag Y. After Pierre transferred 23 of the marbles from Bag X to Bag Y, the ratio of the number of marbles in Bag X to that in Bag Y changed to 3 : 7. Find the ratio of the numbers of marbles in Bag X to the number of marbles in Bag Y at first.