Question

Customers of a phone company can choose between two service plans for long-distance calls. The first plan has no monthly fee but charges $.11 for each minute of calls. The second plan has a $27.00 monthly fee and charges an additional $.07 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?

Answer 1

when is .11n = .07n + 27 , where n is the number of calls