Final answer:
To find the set of numbers, set up the inequality 3x - 12 > 21. Solve the inequality to find that the set of numbers is any numbers greater than 11.
Step-by-step explanation:
To find the set of numbers, we can set up an inequality based on the given information. Let's assume the number in the set is x. The inequality would be 3x - 12 > 21. To solve this inequality, we can add 12 to both sides of the inequality: 3x > 33. Then, we divide both sides by 3 to isolate x: x > 11. So, the set of numbers would be any numbers greater than 11.