the local bookstore is having a sole on used books . nate bought 3 hardcover books and 7 paperback books and spent 29.50. tia bought 2 hardcover books and 5 paperback books and spent 20.50. what is the cost of a hardcover book
The first thing we must do for this case is to define variables. We have then: x = cost of a hardcover book y = cost of a paperback book We write the system of equations: 3x + 7y = 29.50 2x + 5y = 20.50 The solution to the system is: x = 4 $ y = 2.5 $ Answer: the cost of a hardcover book is $ 4
