Two friends, Mason and Zack, decide to race to the park. Mason starts 30 meters closer to park since he has a cast on his foot and can only hobble at a rate of 1 meter per second. Zack does not get a head start and he runs at a rate of 4 meters per second. Write an equation for total distance y after x seconds for each boy.

Mason: Zack:

At what distance and time will the boys be the same distance from the park?