Lizzy: Jamestown has 20 theme parks. If Venice has 25 more theme parks than Jamestown, and Marina Del Ray has 50 more theme parks than Jamestown, calculate the number of theme parks present in the three towns..
Me: Hmmm, let me think. I think this is the detailed solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Since Venice has 25 more theme parks than Jamestown, there are 20 + 25 = 45 theme parks in Venice. Together, Venice and Jamestown have 45 + 20 = 65 theme parks. With 50 more theme parks than Jamestown, Marina Del Ray has 50 + 20 = 70 theme parks. The total number of theme parks in the three towns is 70 + 65 = 135. Final answer: 135.