A telephone company offers two different types of billing. The first choice is to pay $10.00 per month plus $0.09 per MB of data. The second choice is to pay $16.00 per month plus $0.07 per MB of data. Part A: Write a system of equations to model the situation the total cost for one month with each company.

Part B: How many MB of data would you have to use in one month in order for both plans to cost the same amount? Explain how you determined your answer.