Please make a equation for this, and show how to solve. It's taking me hours to do, and my teacher didn't bother explaining this very well. The question is 'A library receives a large cash donation and uses the funds to double the number of books it owns. Then a book collector gives the library 4028 books. After this, the library has 51,514 books. How many books did the library have before the cash donation and the gift of books?
Please add in a two-step equation if you cann