1. The problem statement, all variables and given/known data I got following Question from a book: I am doing it using a different method but my answer is wrong. Can somebody please guide me, what is the problem with it?? The question is: In 1999, Diana read 10 English books and 7 French books. In 2000, she read twice as many French books as English books. If 60% of the books that she read during the two years were French, how many books did she read in 2000? 2. Relevant equations Linear equation in single variable based problem 3. The attempt at a solution 1999: E(10), F(7) = 17 2000: E(x), F(2x) Two years total books = 10 + 7 + x + 2x 1.666x /*60 % */ + 2.5x /* 40 */ = 17 + 3x 4.166 - 3x = 17 X = 14.579 2x = 29 Total = 15 + 29 = 44 (wrong answer) Some body please guide me. Zulfi.