Final answer:
The two numbers are 15 and 9, and the greatest common factor is 3.
Step-by-step explanation:
To find the two numbers, let's set up a system of equations. Let x and y represent the two numbers. From the given information, we can set up the following equations:
x + y = 24
x - y = 6
To solve this system, we can use the method of substitution or elimination. Let's use the method of elimination. Adding the two equations together, we get 2x = 30. Dividing both sides by 2, we find that x = 15. Substituting this value back into one of the original equations, we find that y = 9.
So, the two numbers are 15 and 9, and the greatest common factor is 3.