Answer:
16 years
Explanation:
Break the problem down:
George = 31 + Leo
Leo = Carol - 15
Carol = ?
The problem is asking for the number of years it will take for Carol to be George's current age.
Leo is 15 years younger than Carol which means Carol is 15 years older than Leo.
George is 31 years older than Leo. Carol is older than Leo by 15 years.
This means we have to find the difference between 31 and 15.
31 - 15 = 16
Since the difference between George and Carol's age is 16 years, it will take Carol 16 years to be the same age as George is now.