Sophia finished 2/3 of a book. She calculated that she finished 30 more pages than she has yet to read. How long is her book?
Choose the correct choice from the following: A) A)90 B) B)150 C) C)130 D) D)190 E) E)210
Let x be the total number of pages in the book, then she finished 2/3*x pages.   Then she has x−2/3*x=1/3*x pages left.   2/3*x−1/3*x=30   1/3*x=30   x=90   So the book is 90 pages long.   90nswer is 90.
<result>A</result>
Sophia finished 2/3 of a book. She calculated that she finished 30 more pages than she has yet to read. How long is her book?