Darla:6 books. Katie:6 / 2 = 3 books. Gary: 5(6 + 3) = 45 books. 6 + 3 + 45 = 54 books.
This justifies what answer for what question? Q & A:
Darla has 6 books in her locker. Katie has half as many books as Darla, and Gary has 5 times the number of books that Darla and Katie have combined. How many books do the three have total?
54