Karen is 13 years older than Juan. The sum of their ages is 55. How old is Juan? (Be sure to type only Juan’s age in the answer blank. No variables or words.)

21

To find Juan's age, we can set up a system of equations based on the given information. Let's say Juan's age is represented by "x".

Given that Karen is 13 years older than Juan, her age would be "x + 13".

The sum of their ages is given as 55, so we can express this as an equation:
x + (x + 13) = 55

Simplifying this equation, we have:
2x + 13 = 55

Subtracting 13 from both sides, we get:
2x = 42

Dividing both sides by 2, we find:
x = 21

Therefore, Juan is 21 years old.