Question

larry read a 400 - page book. he read at a rate of 10 pages per day for d days. write an equation that could be used to find out how many days it took larry to read the book.

Explanation:

Step1: Relate rate, days, total pages

Total pages = pages per day × days

Step2: Plug in given values

Substitute 400 for total pages, 10 for pages per day, and $d$ for days.
$10d = 400$

Answer:

$10d = 400$