Answer: Lisa can buy 8 books with her $60 gift card.
Explanation:
60=7.29b
(b variable is how many books)
60=7.29b
We need to get B by itself so we need to divide the 7.29 by itself. But we also have to do the same thing to each side, so 60/7.29 is the resulting problem. After running it through a calculator you get the answer 8.23, but since Lisa can't buy 23/100ths of a book, we can assume she can buy 8 books.