1. The problem is to find the sum of the numbers 5, 6, and 7. 2. The formula for the sum of numbers is simply adding them together: $$\text{Sum} = a + b + c$$ 3. Substitute the given numbers into the formula: $$\text{Sum} = 5 + 6 + 7$$ 4. Perform the addition step-by-step: $$5 + 6 = 11$$ $$11 + 7 = 18$$ 5. Therefore, the sum of 5, 6, and 7 is $$18$$.