Initially, the ratio of Ed's toy cars to Pete's toy cars was 5:2. After Ed gave 30 toy cars to Pete, they each had an equal number of toy cars. How many toy cars did they have altogether?

Answer:

In order for them to have a ratio of cars, there has to be a factor (because ed didn't have 5 cars, and Pete 2). Let's assume this factor to be x. So,

5x - 30 = 2x + 30

3x = 60

x = 20

Therefore, Ed had 100 cars, and Pete had 40 cars.