### Home > GC > Chapter 12 > Lesson 12.1.2 > Problem 12-21

12-21.

**Multiple Choice:** As Carol shopped for a spring picnic, she spent $2.00 for each liter of soda and $3.50 for each bag of chips. In all, she bought 18 items for a total of $43.50. Assuming she only bought chips and soda, how many bags of chips did she buy? Homework Help ✎

a. 9 | b. 5 | c. 15 | d. 3 |

Write two equations: one representing the number of items bought and the other the total price. Solve using the substitution method.

See the online help for problem 5-104, which contains the Math Notes box in Lesson 2.1.3.