Question
There were some beads in Box N and Box P. After Brandon transferred 13 of the beads from Box N to Box P, the ratio of the number of beads in Box N to that in Box P changed to 1 : 7. Find the ratio of the numbers of beads in Box P to the number of beads in Box N at first.
3 m

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There were some beads in Box N and Box P. After Brandon transferred 13 of the beads from Box N to Box P, the ratio of the number of beads in Box N to that in Box P changed to 1 : 7. Find the ratio of the numbers of beads in Box P to the number of beads in Box N at first.