Darryl had 176 books and Gavin had 101 books. When each one gave away the same number of books, Darryl then had 6 times as many books as Gavin. How many books did each friend give away?

D = 176 G = 101

(176 - x) / (101 - x) = 6 / 1 ()

x = 86 This is the number of books each friend gave away.