2906712 2906712

24-01-2017
Mathematics

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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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Аноним Аноним

24-01-2017

I think each book cost $9

Answer Link

24-01-2017

78-7x=15
-7x=-63
X=9
Each book costs $9

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