Question

Kim is reading a book with 380 pages. She read 20 pages each day until she reached Part 2 of the book. Part 2 of the book is 160 pages long. She uses the equation 380−20d=160 to represent the number of days, d, it took her to read Part 1. How many days did it take Kim to read Part 1 of the book?

Answer 1

Explanation:

380-20d=160

subtract 380 from both sides

-20d=-220

divide each side by -20

d=11

Answer 2

Answer: It took her 11 days to read Part 1 of the book.

Explanation:

380 - 20d = 160

Subtract 380 from each side

-20d = -220

Divide each side by -20

d = 11