document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1028923>Question 1028923</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A woman bought 100 Christmas cards. For the ones that sing a song when you open them, she paid 30 cents each. For the rest she paid 5 cents each. If the cards cost $10.25 in all, how many of the expensive kind did she buy? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #643997 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=643997\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A woman bought 100 Christmas cards. For the ones that sing a song when you open them, she paid 30 cents each. For the rest she paid 5 cents each. If the cards cost $10.25 in all, how many of the expensive kind did she buy?<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "s + r = 100 cards<BR>\n" );
document.write( "30s + 5r = 1025 cents<BR>\n" );
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document.write( "Modify for elimination::<BR>\n" );
document.write( "s + r = 100<BR>\n" );
document.write( "6s + r = 205<BR>\n" );
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document.write( "Subtract and solve for \"s\"<BR>\n" );
document.write( "5s = 105<BR>\n" );
document.write( "s = 21 (# of song cards)<BR>\n" );
document.write( "r = 100 -21 = 79 (# of other cards)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );