Question
There were some beads in Packet U and Packet V. After Xavier transferred 25 of the beads from Packet U to Packet V, the ratio of the number of beads in Packet U to that in Packet V changed to 2 : 7. Find the ratio of the numbers of beads in Packet U to the number of beads in Packet V at first.
3 m

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There were some beads in Packet U and Packet V. After Xavier transferred 25 of the beads from Packet U to Packet V, the ratio of the number of beads in Packet U to that in Packet V changed to 2 : 7. Find the ratio of the numbers of beads in Packet U to the number of beads in Packet V at first.