Problema Solution

derman says "im halfway through reading my book. if i read another 84 pages, ill be two thirds of the way through my book." how many pages are in derman's book?

Answer provided by our tutors

let x = the number of pages of the book


x/2 + 84 = (2/3)x


by solving we find:


x = 504 pages


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Derman's book has 504 pages.