Answer:
Victor's age = 24 years old
Explanation:
Let age of Mr. Smith = x and age of Victor = y.
According to the question, we can find two equations.
=> 1) x = y + 81
=> 2) x + 3 = 4(y + 3)
Substituting value of x in (1) to (2)
y + 81 + 3 = 4y + 12
3y = 72
y = 24
Victor's age = 24 years old