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12 April, 01:20

Dan had 78 dollars to spend on 7 books. After buying them he had 15 dollars. How much did each book cost?

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Answers (2)
  1. 12 April, 01:28
    0
    I think each book cost $9
  2. 12 April, 01:40
    0
    78-7x=15

    -7x=-63

    X=9

    Each book costs $9
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