Cell phone companies

Question

The Call first cell phone company charges $30 and an additional $0.18 per text message sent. Another cell phone company Cellular Plus charges $50 and an additional $0.14 per text message sent. How many text messages would have to be sent to make both plans cost the same?

Answer 1

Let X be the number of text messages

Company 1

30 + 0.18X

Company 2

50 + 0.14X

30 + 0.18X = 50 + 0.14X

0.18X - 0.14X = 50 - 30

0.04X = 20

X = 500

You would send 500 text messages to make both plans cost the same.