document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=193747>Question 193747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> erin drove home at an average speed of 45 mph. she returned home in the evening along the same route and average 30 mph. if erin spent a total of 1 hour commuting to and from work, how many miles did erin drive to work in the morning? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #145444 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=145444\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let  vel=Distance/Time<BR>\n" );
document.write( "let  d  =  distance  to  work<BR>\n" );
document.write( "t1=d/vel=d/45<BR>\n" );
document.write( "t2= d/30<BR>\n" );
document.write( "t1+t2=1,,,,given<BR>\n" );
document.write( "d/45+d/30=1<BR>\n" );
document.write( "let  LCD  =90<BR>\n" );
document.write( "(2d +3d)/90  =  1<BR>\n" );
document.write( "5d=90<BR>\n" );
document.write( "d=18\r<BR>\n" );
document.write( "\n" );
document.write( "check<BR>\n" );
document.write( "18/45 +18/30  =1<BR>\n" );
document.write( ".4  +  .6=1,,,,ok </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );