Final answer:
The correct equation representing the sum of a number (n) and 6 being 24 is n + 6 = 24.
Step-by-step explanation:
The equation that shows the relationship between a number (n) and 6 where their sum is 24 is n + 6 = 24. This is because if we add 6 to the unknown number n, the result should be 24, based on the given statement. To solve for n, you would subtract 6 from both sides of the equation, resulting in n = 24 - 6, which simplifies to n = 18.