document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=757155>Question 757155</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jon recently drove to visit his parents who live 192 miles away. On his way there his average speed was 20 mph faster than on his way home. If Jon spent 8 hours driving, find the 2 rates. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #460855 by </B><A HREF=/tutors/aboutme.mpl?userid=LearnWithMajor><B>LearnWithMajor(33)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=LearnWithMajor><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=460855\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = rate of travel to parents, y = rate of travel home\r<BR>\n" );
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document.write( "On his way there his average speed was 20 mph faster than on his way home.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+y+%2B+20 ALIGN=MIDDLE  ALT=\"x+=+y+%2B+20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Jon spent 8 hours driving\r<BR>\n" );
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document.write( "Time equals distance divided by rate.\r<BR>\n" );
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document.write( "t = d/r\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=192%2Fx+%2B+192%2Fy+=+8 ALIGN=MIDDLE  ALT=\"192%2Fx+%2B+192%2Fy+=+8\"   DISABLED_style= \"max-width:90%; height:auto;\" > time for the trip to parents plus time to get home equals 8 hours\r<BR>\n" );
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document.write( "Now substituting y+20 in for x<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=192%2F%28y%2B20%29+%2B+192%2Fy+=+8 ALIGN=MIDDLE  ALT=\"192%2F%28y%2B20%29+%2B+192%2Fy+=+8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=192y+%2B+192%28y%2B20%29+=+8y%28y%2B20%29 ALIGN=MIDDLE  ALT=\"192y+%2B+192%28y%2B20%29+=+8y%28y%2B20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=192y+%2B+192y+%2B+3840+=+8y%5E2+%2B+160y ALIGN=MIDDLE  ALT=\"192y+%2B+192y+%2B+3840+=+8y%5E2+%2B+160y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8y%5E2+-+224y+-+3840+=+0 ALIGN=MIDDLE  ALT=\"8y%5E2+-+224y+-+3840+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5E2+-+28y+-+480+=+0 ALIGN=MIDDLE  ALT=\"y%5E2+-+28y+-+480+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y-20%29%28y%2B12%29=0 ALIGN=MIDDLE  ALT=\"%28y-20%29%28y%2B12%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "y = 20<BR>\n" );
document.write( "x = y + 20 = 20 + 20 = 40 </SPAN>\n" );
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