Question

A phone company offers two monthly plans. Plan A costs 14 plus an additional 0.09 for each minute of calls. Plan B costs 18 plus an additional 0.07 for each minute of calls. For what amount of calling do the two plans cost the same? What is the cost when the two plans cost the same?

Answer 1

200 minutes

Explanation:

14 + 0.09 x = 18 + 0.07 x

0.09 x - 0.07 x = 18 - 14

0.02 x = 4

x = 400/2 = 200