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John currently has enough money to buy 45 books. If each book cost 10 cents less, John could buy 5 more books. How much money does John have to spend on book? (Please be specific with the steps to get the result because I've been having a hard time :? )
Set up an equation when x is the cost of a book. If we know that 45 + 5 = 50: 45x = 50(x - .1) Now, multiply across the parentheses: 45x = 50x - 5 (Now, combine terms over the equal sign) -50x -50x -5x = -5 (Now, divide off the -5 from both sides) /-5 /-5 x = 1 This means that the current cost of a book is $1. This works out if you test it. Hope this helps! ~ArchimedesEleven
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