Lets say that u want to rent some movies. There are 2 video stores in ur town. Video store A charges 5 bucks per movie with no membership fee. Video store B charges 3 bucks per movie, but also charges a 20 dollar membership fee. How many movies must be rented for the video stores to charge the same amount ?
5x = 3x + 20
5x - 3x = 20
2x = 20
x = 20/2
x = 10.......at 10 movies, the 2 video stores charge the same amount