document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=174473>Question 174473</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A stamp collection consists of 3, 8 and 15 cent stamps.  The number of 8 cent stamps is one less than triple the number of 3 cent stamps.  The number of 15 cent stamps is six less than the number of 8 cent stamps.  The total value of all the stamps is $2.47.  Find the number of 8 cent stamps.\r<BR>\n" );
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document.write( "I can not figure out the formula to work this problem.  Can you please explain.\r<BR>\n" );
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document.write( "Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #129458 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=129458\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A stamp collection consists of 3, 8 and 15 cent stamps. <BR>\n" );
document.write( "The number of 8 cent stamps is one less than triple the number of 3 cent stamps. <BR>\n" );
document.write( "e = 3t-1<BR>\n" );
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document.write( "The number of 15 cent stamps is six less than the number of 8 cent stamps.<BR>\n" );
document.write( "f = e - 6<BR>\n" );
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document.write( "The total value of all the stamps is $2.47<BR>\n" );
document.write( "3t+8e+15f = 247<BR>\n" );
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document.write( "Find the number of 8 cent stamps.<BR>\n" );
document.write( "EQUATIONS:<BR>\n" );
document.write( "t = (e+1)/3<BR>\n" );
document.write( "f = e - 6<BR>\n" );
document.write( "8e = 247-3t-15f<BR>\n" );
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document.write( "Substitute for t and for f to solve for e:<BR>\n" );
document.write( "8e = 247 -3(e+1)/3 - 15(e-6)<BR>\n" );
document.write( "8e = 247 -e - 1 -15e + 90<BR>\n" );
document.write( "8e = 336 - 16e<BR>\n" );
document.write( "24e = 336<BR>\n" );
document.write( "e = 14 (number of eight cent stamps)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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