Question
Gem bought some stamps. She gave 13 of the stamps to her sister and sold 47 of the remaining stamps. After that, she bought another 285 stamps and had the same number of stamps that she bought at first. How many stamps did Gem buy at first?
4 m

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Gem bought some stamps. She gave 13 of the stamps to her sister and sold 47 of the remaining stamps. After that, she bought another 285 stamps and had the same number of stamps that she bought at first. How many stamps did Gem buy at first?