Question: Audrey is 7 years older than Heracles. In 3 years, Audrey will be twice as old as Heracles is now. How old is Heracles now?
Solution:
Since Audrey is older than Heracles by 7 years, in 3 years he will be 10 years older than Heracles' current age
In 3 years he will be double Heracles' current age 10 * 2 = 20
Heracles is 10
Answer: 10