A telephone company offers two different types of billing. The first option is to pay an initial $10 fee with an additional $0.09 per MB of data used. The second option is to pay an initial $16 fee plus an additional $0.07 per MB of data used.
Part A: Write a system of equations that will model the situation.
Part B: How many MB of data would you have to use in order for both plans to cost the same amount? Explain how you determined your answer.