Question
There were some marbles in Bag V and Bag W. After Pierre transferred 25 of the marbles from Bag V to Bag W, the ratio of the number of marbles in Bag V to that in Bag W changed to 2 : 5. Find the ratio of the numbers of marbles in Bag V to the number of marbles in Bag W at first.
3 m

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There were some marbles in Bag V and Bag W. After Pierre transferred 25 of the marbles from Bag V to Bag W, the ratio of the number of marbles in Bag V to that in Bag W changed to 2 : 5. Find the ratio of the numbers of marbles in Bag V to the number of marbles in Bag W at first.