document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=50067>Question 50067</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The problem is: Michael drove to a friend's house at a rate of 40mi/h. He returned by the same route at a rate of 45mi/h. the driving time for the round trip was 4 h. What was the distance Michael traveled?\r<BR>\n" );
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document.write( "I know the answer is about 170 miles because (45+40)/2 is 42.5 times 4 is 170. But how do you set up an algebraic equation to solve? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #33309 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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=33309\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x be the distance<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F45%2Bx%2F40=4 ALIGN=MIDDLE  ALT=\"x%2F45%2Bx%2F40=4\"   DISABLED_style= \"max-width:90%; height:auto;\" > because time = distance/speed<BR>\n" );
document.write( "45*40=1800<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1800%28x%2F45%29%2B1800%28x%2F40%29=1800%2840%2F1%29 ALIGN=MIDDLE  ALT=\"1800%28x%2F45%29%2B1800%28x%2F40%29=1800%2840%2F1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "40x+45x=7200<BR>\n" );
document.write( "85x=7200<BR>\n" );
document.write( "x=84.7<BR>\n" );
document.write( "the answer is not 170<BR>\n" );
document.write( "Paul. </SPAN>\n" );
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