Contemporary Mathematics for Business & Consumers 8th Edition by Robert Brechner,Geroge Bergeman

Exercise 53

Set up and solve equations for the following business situations.
Scott Mason purchased a 4-unit apartment building as an investment before he retired. From the rent he collects each month, Scott pays out $600 for expenses. How much rent must he charge for each of the 4 apartments if he wants to make $500 profit each month The amount of rent is the same for each of the apartments.