document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=743921>Question 743921</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A farmer looks out into the barn yard and sees the pigs and chickens. He says to his daughter, I count 40 heads and 100 feet . How many pig s and how many chicken are there? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #453111 by </B><A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><B>tommyt3rd(5050)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><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=tommyt3rd><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=453111\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's use <BR>\n" );
document.write( "P-#pigs<BR>\n" );
document.write( "C-#chickens\r<BR>\n" );
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document.write( "I count 40 heads: every animal has a head so...\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%2BC=40 ALIGN=MIDDLE  ALT=\"P%2BC=40\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "...and 100 feet...\r<BR>\n" );
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document.write( "Pigs have 4 feet so 4P is the number of Pig's feet he sees and by the same thinking 2C is how many Chicken's feet. So...\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4P%2B2C=100 ALIGN=MIDDLE  ALT=\"4P%2B2C=100\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "To make our work easier we'll divide every term by 2...\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2P%2BC=50 ALIGN=MIDDLE  ALT=\"2P%2BC=50\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "We have 2-equations and 2-unknowns:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%2BC=40 ALIGN=MIDDLE  ALT=\"P%2BC=40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2P%2BC=50 ALIGN=MIDDLE  ALT=\"2P%2BC=50\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "From the top equation we can say<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C=40-P ALIGN=MIDDLE  ALT=\"C=40-P\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Next <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2P%2BC=50 ALIGN=MIDDLE  ALT=\"2P%2BC=50\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "becomes...\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2P%2B%2840-P%29=50 ALIGN=MIDDLE  ALT=\"2P%2B%2840-P%29=50\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "From which we can quickly deduce that there are 10 pigs. And since there are 40 animals there must be 30 chickens.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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