Two cars traveled for the same amount of time. the red car traveled 270 miles and the silver card traveled 180 miles. the red car drove 20 miles per hour faster than the silver car. what was the speed, in miles per hour, of the silver car?

You must first figure out how long they were driving for. This could be done using an equation, but I just used the "plug in random numbers" method. By doing this I found that they were driving for 4.5 hours, with the speed of the red car being 60 mph and the speed of the silver car being 40 mph

Google it that might work