document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1205542>Question 1205542</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Alana and Petra go to a used book sale, where every book is the same price. Alana buys 4 books and Petra buys 2 books. They run into their friend Angus, who really loves to read, and discover that he has bought 16 books. Angus received a $15 discount, but he still spent $5 more than alana and petra combined. How much does one book cost? </SPAN>\n" );
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document.write( "Let x be the cost in dollars of each book.<br><BR>\n" );
document.write( "Alana bought 4 books, costing a total of 4x dollars; Petra bought 2, costing 2x dollars.  Together they spent 4x+2x = 6x dollars.<br><BR>\n" );
document.write( "Angus bought 16 books, costing a total of 32x dollars, but got a $15 discount, so the total he paid was 32x-15 dollars.<br><BR>\n" );
document.write( "The amount Angus spent was $5 more than Alana and Petra together:<br><BR>\n" );
document.write( "16x-15 = 6x+5<BR>\n" );
document.write( "10x = 20<BR>\n" );
document.write( "x = 2<br><BR>\n" );
document.write( "ANSWER: the cost of each book was $2<br><BR>\n" );
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