I am three times as old as my son. Five years later, I shall be two and a half times as old as my son. How old am I and how old is my son?

Explanation

To solve the problem step by step, we will define the variables and set up the equations based on the information given.

### Step 1: Define the Variables
Let:
- \( x \) = present age of the son
- \( y \) = present age of the father

**Hint:** Start by identifying what each variable represents based on the context of the problem.
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