document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=197086>Question 197086</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A local hamburger shop sold a combined total of 502 hamburgers and cheeseburgers on Sunday. There were 52 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Sunday?<BR>\n" );
document.write( "let hb be the number of hamburgers and cb be the number of cheeseburgers <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=hb%2Bcb=502 ALIGN=MIDDLE  ALT=\"hb%2Bcb=502\"   DISABLED_style= \"max-width:90%; height:auto;\" > -------(1)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cb=hb%2B52 ALIGN=MIDDLE  ALT=\"cb=hb%2B52\"   DISABLED_style= \"max-width:90%; height:auto;\" > -------(2)<BR>\n" );
document.write( "or<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cb-hb=52 ALIGN=MIDDLE  ALT=\"cb-hb=52\"   DISABLED_style= \"max-width:90%; height:auto;\" > --------(3)<BR>\n" );
document.write( "from (1), <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cb=502-hb ALIGN=MIDDLE  ALT=\"cb=502-hb\"   DISABLED_style= \"max-width:90%; height:auto;\" > ------(4)<BR>\n" );
document.write( "substitute (4) in (3)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=502-2hb=52 ALIGN=MIDDLE  ALT=\"502-2hb=52\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2hb=502-52=450 ALIGN=MIDDLE  ALT=\"2hb=502-52=450\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "therefore, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=hb=450%2F2=225 ALIGN=MIDDLE  ALT=\"hb=450%2F2=225\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "number of hamburgers = 225\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
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