Question
A fruit stall had 3 times as many persimmons as grapefruits. After 15 persimmons were sold, the number of grapefruits became twice the number of the remaining persimmons. How many persimmons were there at the fruit stall at first?
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A fruit stall had 3 times as many persimmons as grapefruits. After 15 persimmons were sold, the number of grapefruits became twice the number of the remaining persimmons. How many persimmons were there at the fruit stall at first?