A hardcover book, which we shall call c, is sold for $8, while a paperback which we shall call p, is sold $7. If the store sold 10 books in one day, that means they sold
[tex]c+p=10[/tex]If they sold a totalof $76, that means c times $8 added to p times $7 equals a total of $76. Therefore;
[tex]8c+7p=76[/tex]We can now solve both equations simultaneously as follows;
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