document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=901301>Question 901301</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There were 13 riders on a bus after the third stop. At each stop, riders got off and on as follows: stop 1--10 off, 15 on; stop 2-- 8 off,20 on; stop 3-- 18off, 3 on. How many riders were on the bus before the first stop? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #546628 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=546628\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+ ALIGN=MIDDLE  ALT=\"+n+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = number of riders that  <BR>\n" );
document.write( "were on the bus before the first stop<BR>\n" );
document.write( "---------------------------------<BR>\n" );
document.write( "1st stop:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+-+10+ ALIGN=MIDDLE  ALT=\"+n+-+10+\"   DISABLED_style= \"max-width:90%; height:auto;\" > after 10 got off<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+-+10+%2B+15+=+n+%2B+5+ ALIGN=MIDDLE  ALT=\"+n+-+10+%2B+15+=+n+%2B+5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "after 15 got on<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "2nd stop:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+%2B+5+-+8+=+n+-+3+ ALIGN=MIDDLE  ALT=\"+n+%2B+5+-+8+=+n+-+3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "after 8 got off<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+-+2+%2B+20+=+n+%2B+18+ ALIGN=MIDDLE  ALT=\"+n+-+2+%2B+20+=+n+%2B+18+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "after 20 got on<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "3rd stop:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+%2B+18+-+18+=+n+ ALIGN=MIDDLE  ALT=\"+n+%2B+18+-+18+=+n+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "after 18 got off<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+%2B+3+ ALIGN=MIDDLE  ALT=\"+n+%2B+3+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "after 3 got on<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "You are told that<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+%2B+3+=+13+ ALIGN=MIDDLE  ALT=\"+n+%2B+3+=+13+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+=+10+ ALIGN=MIDDLE  ALT=\"+n+=+10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There were 10 riders were on <BR>\n" );
document.write( "the bus before the first stop\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );