Reading Pages in a Book

Sara is reading a book that has a total of 120 pages. She has already read 45 pages. If she plans to read 15 more pages each day, how many more days will it take her to finish the book?

Let the number of pages left to read be represented as r.

To find r, we can use the equation:

$$r = 120 - 45$$

Then calculate how many days it will take to read the remaining pages using:

$$d = \f\frac{r}{15}$$