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Adam and Barb planned a used book sale for the weekend so they gathered their books and agreed on a price for hardbacks and a lower price for paperbacks. Adam sold 14 hardcover books and 20 paperbacks and earned $234 for his efforts. Barb sold 15 hardcover books and 9 paperbacks. Barb made $201. How much did they charge for each hardcover and for each paperback?

 

 

Can anyone show how they did this problem if possible??

 Sep 24, 2020
 #1
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How much did they charge for each hardcover and for each paperback?

 

Hallo Guest!

 

\(14p+20h=234\)    | * 3

  \(9p+15h=201\)    | * 4

 

\(42p+60h=702\)

\(\underline{36p+60h=804}\)

           \(6p=-102\)

             \(p=-17\)

 

   \(42\cdot (-17)+60h=702\\ 60h=702+714 \)

           \(h=23.60\)

 

Adam and Barb sold the hardbacks for 23.60 each, gave away the paperbacks and gave 0.17 off each paperback.

laugh  !

 Sep 24, 2020

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