1. The problem is to find the sum of 5 + 5. 2. The formula for addition is simply combining the values: $$a + b = c$$ where $a=5$ and $b=5$. 3. Adding the numbers: $$5 + 5 = 10$$. 4. Therefore, the sum of 5 and 5 is 10. This is a basic addition problem where you combine two numbers to get their total.