Long Distance Telephone Plans

Question

Your long distance telephone provider offers two plans. Plan A has a monthly fee of $15 and $0.25 per minute. Plan B has a monthly fee of $20 and $0.05 per minute. Write and solve an equation to find the number of minutes that you must talk to have the same cost for each of the plans.

Answer 1

let us assume we use both plans for m minutes.

so the eq would be

Plan A=15+ 0.25m

Plan B=20+0.05 m

equating both equation in order to calculate same rate for same number of minutes.

15+0.25m=20+0.05m

0.20m=5

m=25 minutes.