A: To solve this problem, you can use the following equation:
Mother's age + My age = 47 years
Mother's age = 3 * My age
Substituting the second equation into the first equation, we get:
3 * My age + My age = 47 years
4 * My age = 47 years
My age = 47 years / 4
= 11.75 years
Therefore, my mother is 3 * 11.75 years = 35.25 years old.