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=160380-20d=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

If you would like to know how many days did it take Kim to read part 1 of the book, you can calculate this using the following steps:

d ... the number of days
380 pages - 20 pages * d = 160 pages
380 - 20 * d = 160
380 - 160 = 20 * d
220 = 20 * d
d = 220 / 20
d = 11 days

The correct result would be 11 days.