document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=936543>Question 936543</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Smith purchased 10 dollar stamp, 15 dollar stamps and 20 dollars with a total  value of 840 dollars.  If the number of 15 dollars stamps is 8 more than 10 dollar stamps and there are 10 more of the 20 dollar stamps than of the 15 dollar stamps, how many of each does she <BR>\n" );
document.write( "receive?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #569980 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=569980\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Smith purchased 10 dollar stamp, 15 dollar stamps and 20 dollars with a total value of 840 dollars. If the number of 15 dollars stamps is 8 more than 10 dollar stamps and there are 10 more of the 20 dollar stamps than of the 15 dollar stamps, how many of each does she <BR>\n" );
document.write( "receive?<BR>\n" );
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document.write( "Equations<BR>\n" );
document.write( "10t + 15f + 20w = 840 dollars<BR>\n" );
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document.write( "f = t + 8<BR>\n" );
document.write( "w = f + 10<BR>\n" );
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document.write( "Substitute for t and w and solve for \"f\"::<BR>\n" );
document.write( "10(f-8) + 15f + 20(f+10) = 840<BR>\n" );
document.write( "45f + 120 = 840<BR>\n" );
document.write( "45f = 720<BR>\n" );
document.write( "f = 16 (# of 15 dollar bills)<BR>\n" );
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document.write( "t = f-8 = 8(# of ten dollar bills)<BR>\n" );
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document.write( "w = f + 10 = 26 (# of twenty dollar bills)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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