document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=638451>Question 638451</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Dear Sir/Mame, any assistance in the following question will be gratefully taken.<BR>\n" );
document.write( "'Marty buys some stamps. He buys 50 cent and 75 cent stamps to the value of $12.50. Altogether, he buys 21 stamps. How many of each type of stamp does he buy?<BR>\n" );
document.write( "Thank You,<BR>\n" );
document.write( "Kind Regards,<BR>\n" );
document.write( "Sash Lack </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #402204 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10552)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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/cgi-bin/show-face.mpl?user=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=402204\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Dear Sir/Mame, any assistance in the following question will be gratefully taken.<BR>\n" );
document.write( "'Marty buys some stamps. He buys 50 cent and 75 cent stamps to the value of $12.50. Altogether, he buys 21 stamps. How many of each type of stamp does he buy?<BR>\n" );
document.write( "Thank You,<BR>\n" );
document.write( "Kind Regards,<BR>\n" );
document.write( "Sash Lack\r<BR>\n" );
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document.write( "Let amount of 50c stamps purchased be F, and amount of 75c stamps, S\r<BR>\n" );
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document.write( "Then: F + S = 21 ----- eq (i)\r<BR>\n" );
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document.write( "Also, 50F + 75S = 1250 ----- eq (ii)<BR>\n" );
document.write( "- 50F - 50S = - 1,050 ------ Multiplying eq (i) by - 50 ---- eq (iii)<BR>\n" );
document.write( "25S = 200 ---- Adding eqs (iii) & (ii)\r<BR>\n" );
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document.write( "S, or amount of 75c stamps purchased = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200%2F25 ALIGN=MIDDLE  ALT=\"200%2F25\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%288%29 ALIGN=MIDDLE  ALT=\"highlight_green%288%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "F + 8 = 21 ----- Substituting 8 for S in eq (i)<BR>\n" );
document.write( "F = 21 - 8\r<BR>\n" );
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document.write( "F, or amount of 50c stamps purchased = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2813%29 ALIGN=MIDDLE  ALT=\"highlight_green%2813%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "You can do the check, I'm sure!!\r<BR>\n" );
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document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com </SPAN>\n" );
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