Final answer:
To find the son's age, we can set up an equation and solve for 'x'. The son's age is 14 years old.
Step-by-step explanation:
To solve this problem, we can start by setting up an equation. Let's represent the son's age as 'x'. According to the problem, Marc is 4 years older than thrice his son's age. So, we can write the equation as:
46 = 3x + 4
Now, to find the son's age, we need to isolate 'x'. We can do this by subtracting 4 from both sides of the equation:
46 - 4 = 3x
42 = 3x
Finally, we can divide both sides by 3 to solve for 'x':
42 ÷ 3 = x
x = 14
Therefore, the son's age is 14 years old.