Sarah had 207 dollars to spend on 9 books. After buying them she only have 18 dollars. How many books did she buy

Answer 1

Let's assume that Sarah bought x books.

We know that she had 207 dollars to spend on 9 books, so the cost of each book would be:

207/9 = 23 dollars per book

If she bought x books, then the total cost of those books would be:

23x dollars

We also know that after buying the books, she only had 18 dollars left. So we can set up an equation:

207 - 23x = 18

Solving for x, we get:

23x = 189

x = 8.217

Since Sarah cannot buy a fraction of a book, we can round down to the nearest whole number. Therefore, Sarah bought 8 books.