Mark's repair shop charges $55 to run a required diagnostic on a vehicle and $25.50 per hour for labor. Rebecca paid $144.25 to have her car repaired. Which equation can be used to determine h, the number of hours it took the mechanic to repair Rebecca's car?
55 is the starting value, 25.50 is what it costs every hour to do work on the car. To solve you would subtract 55 from both sides and then divide by 25.50 to find that it takes 3.5 hours.
