Question: Zach wants to ride on the Ferris wheel and the roller coaster. The Ferris wheel costs 2.0 tickets, the roller coaster costs 7.0 tickets, and there is a discount of 1.0 ticket for going on multiple rides. Zach also has a newspaper coupon for a free 1.0  ticket. How many tickets did Zach need to buy to go on both rides.
Answer: 7