[Question]: John's pool is 5 feet deeper than 2 times Sarah’s pool. If John’s pool is 15 feet deep, how deep is Sarah’s pool?
[Answer]: Let x be the number of feet in John’s pool. 2 * x + 5 = 15. 2x = 10. x = 5.
So the answer is 5.

[Question]: 3 families of 4 people shared a vacation rental for 7 days. Everyone uses 1 oversized beach towel a day before getting a new one. The washing machine can hold 14 oversized beach towels per load. How many loads of laundry will it take to wash all the oversized beach towels?
[Answer]: There are 3 families of 4 meaning there are 3 * 4 = 12 people in the vacation rental. They all use 1 oversized beach towel a day so they use 1 * 12 = 12 towels a day. They use 12 towels a day for 7 days so in one week they use 12 * 7 = 84 beach towels. The washing machine can only hold 14 towels and they have 84 towels to wash which means there are 84 / 14 = 6 loads of laundry.
So the answer is 6.

[Question]: James spends 40 years teaching. His partner has been teaching for 10 years less. How long is their combined experience?
[Answer]:

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
His partner has been teaching for 40 - 10 = 30 years. So together they have 40 + 30 = 70 years of experience.
So the answer is 70.