This is the incomplete question.
I hope we need to find the remaining amount and choices must be given.
Hope this is your question, if not I think you will, still be able to
find an answer of your question based on this solution.
Since you are spending $2 each day.
So, in d days you will spend 2d.
You had $207. So, to get the amount of remaining amount we will subtract 2d from total amount 207.
Hence, remaining amount = $ ( 207 - 2d)
