Can you determine what number x represents from the information given? Explain how you got your answer.

Answer:

Yes, x represents 20. First, find the total number of people who do not lift weights by subtracting 65 from 120, which is 55. Then, find the number of people who run but do not lift weights by subtracting 40 from 75, which is 35. Finally, subtract 35 from 55 to find that x = 20 people who do not run or lift weights.