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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?

Dan had 78 dollars to spend on 7 books. After buying them he had 15 dollars. How much did each book cost?
asked 170k views
2 votes
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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User Smeshko
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7.7k points

2 Answers

4 votes
I think each book cost $9
answered
User Akshay Nalawade
by
8.6k points
6 votes
78-7x=15
-7x=-63
X=9
Each book costs $9
answered
User Rwehner
by
8.1k points
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