Gradient from 2 - 1/2y = 0

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.