document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=917735>Question 917735</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a class 40% are girls and the rest are boys. If 15 girls are added in the class,then 52% girls would be there. Find the number of boys and girls in the beginning? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #556778 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=556778\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x for girls, y for boys\r<BR>\n" );
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document.write( "system(x/(x+y)=0.4,y/(x+y)=0.6)<BR>\n" );
document.write( "but x+y is not known\r<BR>\n" );
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document.write( "Concentrate just on how many girls.<BR>\n" );
document.write( "Let p be number of students.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2Fp=0.4 ALIGN=MIDDLE  ALT=\"x%2Fp=0.4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Add 15 more girls.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2B15%29%2F%28p%2B15%29=0.52 ALIGN=MIDDLE  ALT=\"%28x%2B15%29%2F%28p%2B15%29=0.52\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Also you expect <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=p ALIGN=MIDDLE  ALT=\"x%2By=p\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The description gives this system:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28system%28x%2Fp=0.4%2C%28x%2B15%29%2F%28p%2B15%29=0.52%2Cx%2By=p%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28system%28x%2Fp=0.4%2C%28x%2B15%29%2F%28p%2B15%29=0.52%2Cx%2By=p%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28x=0.4p%2Cx%2B15=0.52%28p%2B15%29%2Cx%2By=p%29 ALIGN=MIDDLE  ALT=\"system%28x=0.4p%2Cx%2B15=0.52%28p%2B15%29%2Cx%2By=p%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28x=0.4p%2Cx%2B15=0.52p%2B7.8%2Cx%2By=p%29 ALIGN=MIDDLE  ALT=\"system%28x=0.4p%2Cx%2B15=0.52p%2B7.8%2Cx%2By=p%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28system%28x=0.4p%2Cx%2B7.2=0.52p%2Cx%2By=p%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28system%28x=0.4p%2Cx%2B7.2=0.52p%2Cx%2By=p%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Use the first two equations to solve for x and p using substitution.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.4p%2B7.2=0.52p ALIGN=MIDDLE  ALT=\"0.4p%2B7.2=0.52p\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7.2=0.12p ALIGN=MIDDLE  ALT=\"7.2=0.12p\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28p=60%29 ALIGN=MIDDLE  ALT=\"highlight%28p=60%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=0.4p ALIGN=MIDDLE  ALT=\"x=0.4p\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%280.4%29%2860%29 ALIGN=MIDDLE  ALT=\"x=%280.4%29%2860%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=24%29 ALIGN=MIDDLE  ALT=\"highlight%28x=24%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now p and x are known.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=p ALIGN=MIDDLE  ALT=\"x%2By=p\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=p-x ALIGN=MIDDLE  ALT=\"y=p-x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=60-24 ALIGN=MIDDLE  ALT=\"y=60-24\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28y=36%29 ALIGN=MIDDLE  ALT=\"highlight%28y=36%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "RESULT:<BR>\n" );
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document.write( "Girls,24<BR>\n" );
document.write( "Boys,36<BR>\n" );
document.write( "How Many Students, 60<BR>\n" );
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document.write( " </SPAN>\n" );
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