document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=832899>Question 832899</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Joe is twice as old as David. The sum of their ages is 63. How old are David and Joe </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #502222 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=502222\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -------<BR>\n" );
document.write( "Joe is twice as old as David. <BR>\n" );
document.write( "The sum of their ages is 63. <BR>\n" );
document.write( "How old are David and Joe<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "j = 2d<BR>\n" );
document.write( "j+d = 63<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Substitute for \"j\" and solve for \"d\":<BR>\n" );
document.write( "2d + d = 63<BR>\n" );
document.write( "3d = 63<BR>\n" );
document.write( "David = 21 years<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "Solve for \"j\":<BR>\n" );
document.write( "j = 2d<BR>\n" );
document.write( "Joe = 2*21 = 42 years<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "---------------- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );