Question

Bob has 18 model cars and ships. He has 8 more cars than ships. How many cars does he have?

Answer 1

There would be 13 cars and 5 ships.

Answer 2

Let x = # of cars, then x - 8 = # of ships.

x + x - 8 = 18

2x - 8 = 18

I hope this helps you to see how Brittany could have gotten her answer.