Joseph gave 23 cards to each of his 15 students and had 12 cards left. How many cards did Joseph have at first?
Thoughts? Step-by-step reasoning:
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He gave 23 cards each to 15 students for a total of 23 * 15 = 345 cards. He has 12 cards left, so originally the number of cards was 345 + 12 = 357 cards.
Thus, the answer is 357.
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