soja finished 2 / 3 of a book . she calculated that she finished 100 more pages than she has yet to read . how long is her book ?
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 = 100 1 / 3 * x = 100 x = 300 so the book is 300 pages long . answer is a .
multiply(100, 3)