document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1005531>Question 1005531</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I can't seem to come up with the correct equation to start this math problem. Could someone please help me?\r<BR>\n" );
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document.write( "A family has two cars. During one particular week, the first car consumed <BR>\n" );
document.write( "30 gallons of gas and the second consumed <BR>\n" );
document.write( "40 gallons of gas. The two cars drove a combined total of <BR>\n" );
document.write( "2400 miles, and the sum of their fuel efficiencies was <BR>\n" );
document.write( "70 miles per gallon. What were the fuel efficiencies of each of the cars that week? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #621765 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=621765\">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=+d+ ALIGN=MIDDLE  ALT=\"+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = distance in miles driven by the<BR>\n" );
document.write( "car that consumed 30 gallons of gas<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2400+-+d+ ALIGN=MIDDLE  ALT=\"+2400+-+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = distance driven by the<BR>\n" );
document.write( "car that consumed 40 gallons of gas<BR>\n" );
document.write( "-----------------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%2F30+ ALIGN=MIDDLE  ALT=\"+d%2F30+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = fuel efficiency of 1st car<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+2499+-+d+%29%2F40+ ALIGN=MIDDLE  ALT=\"+%28+2499+-+d+%29%2F40+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = fuel efficiency of 2nd car<BR>\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%2F30+%2B+%28+2400+-+d+%29%2F40+=+70+ ALIGN=MIDDLE  ALT=\"+d%2F30+%2B+%28+2400+-+d+%29%2F40+=+70+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1200+ ALIGN=MIDDLE  ALT=\"+1200+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+40d+%2B+30%2A%28+2400+-+d+%29+=+70%2A1200+ ALIGN=MIDDLE  ALT=\"+40d+%2B+30%2A%28+2400+-+d+%29+=+70%2A1200+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+40d+%2B+72000+-+30d+=+84000+ ALIGN=MIDDLE  ALT=\"+40d+%2B+72000+-+30d+=+84000+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+10d+=+12000+ ALIGN=MIDDLE  ALT=\"+10d+=+12000+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+1200+ ALIGN=MIDDLE  ALT=\"+d+=+1200+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2400+-+d+=+2400+-+1200+ ALIGN=MIDDLE  ALT=\"+2400+-+d+=+2400+-+1200+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2400+-+d+=+1200+ ALIGN=MIDDLE  ALT=\"+2400+-+d+=+1200+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "Both cars drove 1200 mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%2F30+=+1200%2F30+ ALIGN=MIDDLE  ALT=\"+d%2F30+=+1200%2F30+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%2F30+=+40+ ALIGN=MIDDLE  ALT=\"+d%2F30+=+40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++%28+2400+-+d+%29%2F40+=+1200%2F40+ ALIGN=MIDDLE  ALT=\"++%28+2400+-+d+%29%2F40+=+1200%2F40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++%28+2400+-+d+%29%2F40+=+30+ ALIGN=MIDDLE  ALT=\"++%28+2400+-+d+%29%2F40+=+30+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "The 1st car's fuel efficiency was 40 mi/gallon<BR>\n" );
document.write( "The 2nd car's fuel efficiency was 30 mi/gallon\r<BR>\n" );
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document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );