To return a book to the library on time, Billy needs to read 40 pages every day. However, Billy reads 15 pages fewer than he should each day, and returns the book six days late. In how many days was Billy supposed to read the book?
3 answers
Billy was supposed to read the book in 40 days.
Solve:
8y(5y-1)-10y(4y-5)=6y-5(3+y)-67
8y(5y-1)-10y(4y-5)=6y-5(3+y)-67
25 pages/day * (d +6 )= 40 d
25 d + 150 = 40 d
15 d = 150
d = 10 days
25 d + 150 = 40 d
15 d = 150
d = 10 days