Two cars got an oil change at the same auto shop. The shop charges customers for each quart of oil plus a flat fee for labor. The oil change for one car required 5 quarts of oil and cost $20.70. The oil change for the other car required 7 quarts of oil and cost $23.20. How much is the labor fee and how much is each quart of oil?

4x - 6

Step-by-step explanation:

Remember the formula for finding the area of a parallelogram;

Manipulate the equation such that it is solved for the base;

So the equation that needs to be solved is;

Set up the division problem and solve;

              _____4x - 6___

    |

                ________

                       -6x - 6

                      ________

                              0