document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=712175>Question 712175</A>: <I><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Dave is twice as old as Rick. Ten years ago the sum of their ages was 40. How old are they now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #437833 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley79><B>checkley79(3341)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley79><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=437833\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=2R<BR>\n" );
document.write( "D-10+2R-10=40<BR>\n" );
document.write( "2R-10+2R-10=40<BR>\n" );
document.write( "4R-20=40<BR>\n" );
document.write( "4R=40=20<BR>\n" );
document.write( "4R=60<BR>\n" );
document.write( "R=60/4<BR>\n" );
document.write( "R=15 AGE OF RICK NOW.<BR>\n" );
document.write( "D=2*15=30 AGE OF DAVE NOW.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "30-10+2*15-10=40<BR>\n" );
document.write( "20+30-10=40<BR>\n" );
document.write( "50-10=40<BR>\n" );
document.write( "40=40<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );