Give the step-by-step reasoning process and then the final answer. Jed is 10 years older than Matt. In 10 years, Jed will be 25 years old. What is the sum of their present ages?
Jed is 25 - 10 = 15 years old now. So, Matt is 15 - 10 = 5 years old now. Thus, the sum of their present ages is 15 + 5 = 20.
The final answer: 20.