Sumaya is reading a book with 240 pages. she has already read 90 pages. she plans to read 20 more pages each day until she finishes the book. a. sumaya writes the equation 330= -20d to find the number of days she will need to finish the book. identify the areas that sumaya made. b.write and solve an equation to determine how many days sumaya will need to finish the book. in your answer, count part of the day as a full day.