document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=706985>Question 706985</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One morning, Justin drove 2 hours before stopping to eat lunch at Pizza Hut. After lunch, he increased his speed by 10 mph. If he completed a 470-mile trip in 7 hours of driving time, how fast did he drive 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 #435458 by </B><A HREF=/tutors/aboutme.mpl?userid=nshah11><B>nshah11(47)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nshah11><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=435458\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assume Justin's speed in the morning was x mph. It then follows from the problem that:\r<BR>\n" );
document.write( "\n" );
document.write( "(470 - 2x)/(x + 10) = 5\r<BR>\n" );
document.write( "\n" );
document.write( "470 - 2x = 5x + 50\r<BR>\n" );
document.write( "\n" );
document.write( "420 = 7x => x = 60 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );