Question
Fanny bought some cards. She gave 13 of the cards to her cousin and sold 37 of the remaining cards. After that, she bought another 39 cards and had the same number of cards that she bought at first. How many cards did Fanny buy at first?
4 m

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Fanny bought some cards. She gave 13 of the cards to her cousin and sold 37 of the remaining cards. After that, she bought another 39 cards and had the same number of cards that she bought at first. How many cards did Fanny buy at first?