Question

A bookcase in a classroom contains textbooks that weigh 0.8 pound each. The bookcase alone weighs 22.2 pounds. If the total weight of the books and the bookcase is 31.8 pounds, how many books are in the bookcase?

Answer 1

It should be 12 because:

31.8 - 22.2 = 9.6

9.6 ÷ 0.8 = 12

Answer 2

I think 12.

31.8 - 22.2 = 9.6
9.6 ÷ 0.8 = 12