Customers of a phone company can choose between two service plans for long distance calls. The first plan has an $8 monthly fee and charges an additional $0.16 for each minute of calls. The second plan has a $15 monthly fee and charges an additional $0.12 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?

Question

anonymous · Answer

@pooja195 @triciaal

directrix · Answer

The cost of Plan I = .16*x + 8 where x is the number of minutes talked

The cost of Plan 2 = .12*x + 15 where x is the number of minutes talked.

directrix · Answer

To find the value of x for which the two plans will cost the same amount, solve the two equations and solve for x.

directrix · Answer

Let P1 = P2
By substitution, 
.16*x + 8 = .12*x + 15

Solve for x. 

@KellyRJr