Question
Isaac and Avery had 164 cards altogether. After Isaac gave 15 cards to Avery, Isaac had 3 times as many cards as Avery. How many cards did Avery have at first?
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Isaac and Avery had 164 cards altogether. After Isaac gave 15 cards to Avery, Isaac had 3 times as many cards as Avery. How many cards did Avery have at first?