document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=386058>Question 386058</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Frank can type a report in 3 hours and James takes 7 hours. How long will it take the two of them typing together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #272972 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=272972\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Frank can type a report in 3 hours and James takes 7 hours. How long will it take the two of them typing together?<BR>\n" );
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document.write( "Frank rate = 1/3 job/hr<BR>\n" );
document.write( "James rate = 1/7 job/hr<BR>\n" );
document.write( "Together rate = 1/x job/hr<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "rate + rate = together rate<BR>\n" );
document.write( "1/3 + 1/7 = 1/x <BR>\n" );
document.write( "(7+3)/21 = 1/x<BR>\n" );
document.write( "x = 21/10<BR>\n" );
document.write( "x = 2.1 hrs = 2 hr 6 minutes (time to do the job together0<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );