Gillian purchased 25 books at the library book sale. Each hardcover book cost $1.50, and each paperback book cost $0.50. Gillian spent a total of $26.50. The book costs can be represented by the system of equations below.

h + p = 25

1.50h + 0.50p = 26.50


How many paperback books did Gillian buy?

11

12

13

14