document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=188885>Question 188885</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A postal clerk sold some 13 cent stamps and some 20 cent stamps. Altogether, 60 stamps were sold sold for a total cost of $10.25. How many 13 cent stamps were sold? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #141650 by </B><A HREF=/tutors/aboutme.mpl?userid=jojo14344><B>jojo14344(1513)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jojo14344><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=141650\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Tahoma\" size=1.5><BR>\n" );
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document.write( "Let <font color=blue>x</font> = 13 cent stamps<BR>\n" );
document.write( "And <font color=blue>y</font> = 20 cent stamps\r<BR>\n" );
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document.write( "Then, <font color=blue>x + y =60 </font>, Eqn 1\r<BR>\n" );
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document.write( "Also, <font color=blue>0.13x + 0.20y = $10.25</font>, Eqn 2\r<BR>\n" );
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document.write( "In Eqn 1 you get, <font color=blue>y = 60 - x</font>, Eqn 3.<BR>\n" );
document.write( "Substitute Eqn 3 in Eqn 2:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.13x%2B0.20%28highlight%2860-x%29%29=10.25 ALIGN=MIDDLE  ALT=\"0.13x%2B0.20%28highlight%2860-x%29%29=10.25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.13x%2B12-0.20x=10.25 ALIGN=MIDDLE  ALT=\"0.13x%2B12-0.20x=10.25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12-10.25+=+0.20x-0.13x ALIGN=MIDDLE  ALT=\"12-10.25+=+0.20x-0.13x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1.75=0.07x ALIGN=MIDDLE  ALT=\"1.75=0.07x\"   DISABLED_style= \"max-width:90%; height:auto;\" > -----> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cross%281.75%2925%2Fcross%280.07%29=cross%280.07%29x%2Fcross%280.07%29 ALIGN=MIDDLE  ALT=\"cross%281.75%2925%2Fcross%280.07%29=cross%280.07%29x%2Fcross%280.07%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=25%29 ALIGN=MIDDLE  ALT=\"highlight%28x=25%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, Number of 13cent stamps ( Answer )\r<BR>\n" );
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document.write( "Go back Eqn 3:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=60-25=red%2835%29 ALIGN=MIDDLE  ALT=\"y=60-25=red%2835%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, Number of 20 cent stamps\r<BR>\n" );
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document.write( "Let's check, go back Eqn 2:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.13%2825%29+%2B+0.20%2835%29+=10.25 ALIGN=MIDDLE  ALT=\"0.13%2825%29+%2B+0.20%2835%29+=10.25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3.25%2B7.00=10.25 ALIGN=MIDDLE  ALT=\"3.25%2B7.00=10.25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10.25=10.25 ALIGN=MIDDLE  ALT=\"10.25=10.25\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Thank you,<BR>\n" );
document.write( "Jojo</font> </SPAN>\n" );
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