document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=160932>Question 160932</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question: Steve traveled 600 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle.\r<BR>\n" );
document.write( "\n" );
document.write( "Here's what i've done, but i'm not sure if it is correct.<BR>\n" );
document.write( "d=rt<BR>\n" );
document.write( "600=(x-1)20<BR>\n" );
document.write( "600=20x-20<BR>\n" );
document.write( "+20    +20<BR>\n" );
document.write( "620=20x (i divided both sides by 20)<BR>\n" );
document.write( "31=x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #118623 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=118623\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"Steve traveled 600 miles at a certain speed\" __ 600=rt __ 600/r=t\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "\"Had he gone 20mph faster, the trip would have taken 1 hour less\" __ 600=(r+20)(t-1) __ 600=rt+20t-r-20\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "substituting __ 600=(600)+20(600/r)-r-20 __ subtracting 600 __ 0=12000/r-r-20\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "multiplying by -r __ 0=r^2+20r-12000 __ factoring __ 0=(r+120)(r-100)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "0=r+120 __ -120=r __ negative value not realistic\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "0=r-100 __ 100=r __ heavy foot </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );