Jim walks 3 miles per hour slower than his friend Steve runs. Steve runs 4 miles per hour slower than his friend Matt rides his bike. Jim walks 25 miles in the same time Matt rides his bike miles. Steve runs 16 miles in the same time Matt rides his bike 24 miles. Part A: Write an equation to calculate Jim's speed.

Part B: Write an equation to calculate Steve's speed.

Part C: Write two equations that can be used to calculate Matt's speed.