Write a system of equations to describe the situation below, solve using any method, and fill in the blanks. Kathleen and Becky are comparing the international calling plans on their cell phones. On her plan, Kathleen pays $5 just to place a call and $2 for each minute. When Becky makes an international call, she pays $2 to place the call and $5 for each minute. A call of a certain duration would cost exactly the same under both plans. What is the duration? What is the cost?

A call of minutes would cost $under each plan.