Question

A phone company offers two monthly plans. Plan A costs $20 plus an additional $0.08 for each minute of calls. Plan B costs $16 plus an additional $0.13 for each minute of calls. For what amount of calling do the two plans cost the same? minutes What is the cost when the two plans cost the same? ​

Answer 1

20 + 0.08x = 16 + 0.13x
20 - 16 = 0.13x - 0.08x
4 = 0.05x
x = 80 minutes

20 + 0.08(80) = 16 + 0.13(80)
20 + 6.4 = 16 + 10.4
$26.40