Question
There were some marbles in Packet M and Packet N. After Owen transferred 15 of the marbles from Packet M to Packet N, the ratio of the number of marbles in Packet M to that in Packet N changed to 1 : 8. Find the ratio of the numbers of marbles in Packet M to the number of marbles in Packet N at first.
3 m

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There were some marbles in Packet M and Packet N. After Owen transferred 15 of the marbles from Packet M to Packet N, the ratio of the number of marbles in Packet M to that in Packet N changed to 1 : 8. Find the ratio of the numbers of marbles in Packet M to the number of marbles in Packet N at first.