6. A bus company always keeps 3 tires in stock for every bus it owns, plus an additional 30 tires in stock for emergencies. According to this policy, the bus company needs to have a total of 120 tires in stock. How many buses does the company own?

Answer and Explanation

Your Answer is

Correct Answer is F

Explanation

There are x buses. So you can make a linear equation in one variable: 20=30+3x solves x=30