document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=842047>Question 842047</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two crews are digging an 800-meter tunnel through Marble Mountain. Crew A starts at the west end and digs at a rate of 9m/day.  Five days later, Crew B starts at a rate of 10m/day. How many days will Crew A have been working when the tunnel is finished? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #507387 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=507387\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two crews are digging an 800-meter tunnel through Marble Mountain.<BR>\n" );
document.write( " Crew A starts at the west end and digs at a rate of 9m/day.<BR>\n" );
document.write( "  Five days later, Crew B starts at a rate of 10m/day.<BR>\n" );
document.write( " How many days will Crew A have been working when the tunnel is finished?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let t = no. of days dug by crew A<BR>\n" );
document.write( "Crew B starts 5 days later, therefore<BR>\n" );
document.write( "(t-5) = no. of days dug by crew B<BR>\n" );
document.write( ":<BR>\n" );
document.write( "9t + 10(t-5) = 800<BR>\n" );
document.write( "Find t </SPAN>\n" );
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