The answer is the option b: b. 
The explanation is shown below:
1. You have that <em>S</em> represents the number of tickets for the Spartans and <em>V</em> represents the number of tickets for the visiting team's fans, and the seating capacity of the Spartan Stadium is 30,000. Therefore, the total number of tickets is 30,0000:

2. If the Spartans get four times as many tickets as the visiting team, you have:


3. If you solve the system of equations by the method of substitution, you obtain:



4. Calculate <em>S:</em>

