a shopkeeper buys a number of books for Rs 80,if he had brought 4 more for the same amount ,each book would have cost Rs 1 less .how many books did he buy? :confused:

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- Aug 17th 2006, 12:43 AManjanaquadratic equations
a shopkeeper buys a number of books for Rs 80,if he had brought 4 more for the same amount ,each book would have cost Rs 1 less .how many books did he buy? :confused:

- Aug 17th 2006, 03:17 AMCaptainBlackQuote:

Originally Posted by**anjana**

If he had bought b+4 books for 80 Rupees he would have paid 80/(b+4)

Rupees for each book, but we are told this is 1 Rupee less than he did

pay per book so:

80/(b+4)=80/b - 1

This is the equation you need to solve to find b the number of books he

bought.

RonL