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Armando bought 45 baseball cards. Of the 12 friends he invited to his cookout, half of them were able to attend. Armando gave each of his friends at the cookout the same number of baseball cards and had 3 cards left for himself. How many baseball cards did each friend receive?
45 Cards 12 friends invited; 1/2 came 12 x 1/2=6 Let x stand for the number of cards each friend received Armando kept 3 6x = 45-3 6x = 42 __ __ 6 6 x = 7
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