help me with this please

Question

Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $19

 monthly fee and charges an additional $0.17

 for each minute of calls. The second plan has a $26

 monthly fee and charges an additional $0.13

 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?

Answer 1

19+.17m = 26 +.13m

.04m = 7

m = 7/.04 = 700/4 =175 minutes and both cost the same $48.75 each