Question

Mrs. Snell is writing a book. She has already written 25 pages and

decides to write 4 pages a day to reach a total of 225 pages.
Which equation can be used to
determine how many days d Mrs. Snell needs to write to reach
225 pages?

Answer 1

4d+25=225

I am not sure what are the options, if this is one, here is your answer, if it isn't an answer...could you please post them?