There were 53 dollars in Olivia's wallet. She collected 91 more dollars from an atm. After she visited a supermarket there were 14 dollars left. How much more money did she spend at the supermarket than she collected at the atm?
Let's denote the amount of money Olivia collected at the ATM by x. Then the amount of money she spent at the supermarket is x-14. 

The difference between the amount of money Olivia spent at the supermarket and the amount of money she collected at the ATM is 

x-(x-14)=14. 

Therefore the answer (numeric) is: 

14 = 91-14 = 77-53 = 24