Sophia finished 2323 of a book. She calculated that she finished 90 more pages than she has yet to read. How long is her book?	Options:
A) 140  B) 320  C) 745  D) 270  E) 350
Let x be the total number of pages in the book, then she finished 23⋅x pages.   Then she has x−23⋅x=13⋅xpages left.   23⋅x−13⋅x=90   13⋅x=90   x=270   So the book is 270 pages long.   correct answer is 270)270
<result>D</result>
Sophia finished 2323 of a book. She calculated that she finished 90 more pages than she has yet to read. How long is her book?