# How many days will it take Carlos to read a book with 156 pages, if Carlos is trying to read 12 pages of his book a night?

May 23, 2018

See a solution process below:

#### Explanation:

We can write the equation to solve this problem as:

$d = \frac{g}{p}$

Where:
- $d$ is the number of days it will take to read the book, what we are solving for in this problem.
- $g$ is the number of pages in the book: $156 \text{ pages}$ for this problem.
- $p$ is the number of pages read per day: (12"pages")/"day" for this problem.

Substituting and calculating $d$ gives:

$d = \left(156 \text{ pages")/((12"pages")/"day}\right)$

$d = \left(156 \text{ pages"" day")/(12"pages}\right)$

$d = \left(156 \textcolor{red}{\cancel{\textcolor{b l a c k}{\text{ pages")))" day")/(12color(red)(cancel(color(black)("pages}}}}\right)$

$d = \frac{156 \text{ day}}{12}$

$d = 13 \text{ days}$

It should take Carlos 13 days to read the book.