Answer: 13
Explanation: Subtract 11-15 so you get -4 since 15 is greater than 11. Now, add the 4 to the -4 to get 0. Finally, add 13 to 0 to get 13. I think this is the answer, but to be honest, I am having a hard time solving the part of the question that says jdhudbchd zisbdix
