Huilan's age is three times Thomas's age. The sum of their ages is 104. What is Thomas's age?

Let's denote Thomas's age as T and Huilan's age as H.

We know that Huilan's age is three times Thomas's age, so we can say:

H = 3T

We also know that the sum of their ages is 104, so we can say:

T + H = 104

Substitute the first equation into the second equation to solve for T:

T + 3T = 104
4T = 104
T = 26

Therefore, Thomas's age is 26 years old.