Number of Problems:
1. The solution to a system of three equations in three variables is ____ one point.
Use the elimination method to solve the system. (2-4)
Solve the system by the method of substitution. (5-6)
10. Tasty Bakery sells three kinds of muffins: chocolate chip muffins for $0.65 each, oatmeal muffins for $0.70 each, and blueberry muffins for $0.75 cents each. Charles buys some of each kind and chooses three more chocolate chip muffins than blueberry muffins. If he spends $6.85 on 10 muffins, how many of each type of muffin does he buy? Write and solve a system of three equations in three variables. Show your work.