Answer:
<em>Sam is 30 years old, and Harry is 10 years old.</em>
Step-by-step explanation:
Let us assume that the age of Sam is x and the age of Harry is y.
Sam is currently is three times Harry's age.
So,
----------------------1
Sam's age is also 10 more than twice Harry's age.
so,
---------------2
Subtracting 2 from 1, we get



putting this in equation 1,

Therefore, Sam is 30 years old, and Harry is 10 years old.