Question
There were some marbles in Packet R and Packet S. After Carl transferred 15 of the marbles from Packet R to Packet S, the ratio of the number of marbles in Packet R to that in Packet S changed to 3 : 5. Find the ratio of the numbers of marbles in Packet R to the number of marbles in Packet S at first.
3 m

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There were some marbles in Packet R and Packet S. After Carl transferred 15 of the marbles from Packet R to Packet S, the ratio of the number of marbles in Packet R to that in Packet S changed to 3 : 5. Find the ratio of the numbers of marbles in Packet R to the number of marbles in Packet S at first.