document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1118395>Question 1118395</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi<BR>\n" );
document.write( "9 out of every 20 pupils take a bus to school.  The rest either by car or van. The ratio of the pupils who go by bus to those by van is 3 to 1. How many pupils are in the school if 720 go by car.\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 #733695 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=733695\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> b, by bus<BR>\n" );
document.write( "c, by car<BR>\n" );
document.write( "v, by van\r<BR>\n" );
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document.write( "The description is these three equations:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%289%2F20=b%2F%28b%2Bc%2Bv%29%2Cb%2Fv=3%2Cc=720%29 ALIGN=MIDDLE  ALT=\"system%289%2F20=b%2F%28b%2Bc%2Bv%29%2Cb%2Fv=3%2Cc=720%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The first <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%2F20 ALIGN=MIDDLE  ALT=\"9%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" > proportion can be expressed as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%2F20=%283v%29%2F%283v%2B720%2Bv%29 ALIGN=MIDDLE  ALT=\"9%2F20=%283v%29%2F%283v%2B720%2Bv%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28v=270%29 ALIGN=MIDDLE  ALT=\"highlight%28v=270%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >------go on from there. </SPAN>\n" );
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