A chemical manufacturer wants to lease the fleet of 27 railroad tank cars with combined carrying capacity of 420,000 gallons. Tank cars with three different carrying capacities are available: 7,000 gallons, 14,000 gallons, and 28,000 gallons. How many of each type of tank car should be leased?
1. Define your variables and write a system of equations that would represent this situation.
2. What is the solution to this problem.