Originally Posted by

**David Green** Ok, I have two telephone companies, one is offering calls at £0.10p with a monthly fee of £10, the second company is offering calls at £0.20p with a monthly fee of £5.

I am asked to create a formula using simultaneous equations, the question does not ask me to solve the equations.

I was told to use the letter "p" for the cost of calls per month, and "n" for the number of phone calls per month.

What I have learned so far is that the number of phone calls per month is not given, but the price per call and a monthly fee are, so based on this information I came up with the following formula.

N = 10p + 0.10

N = 5p + 0.20

Do these equations seem realistic, my understanding is that N would tell me the number of calls per month, and P would tell the total cost of calls per month.

Please advise

Thanks

David