document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=884871>Question 884871</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Three years ago,the difference in the ages of two brothers was 2 years.The sum of their present ages will double in 10 years.What is the present age of the elder brother <BR>\n" );
document.write( "(A)6<BR>\n" );
document.write( "(B)11<BR>\n" );
document.write( "(C)7<BR>\n" );
document.write( "(D)9 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #534717 by </B><A HREF=/tutors/aboutme.mpl?userid=JulietG><B>JulietG(1812)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=JulietG><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=JulietG><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=534717\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The difference in their ages won't change.  It's still 2 years.  the \"three years ago\" is to mess up your equation :-\<BR>\n" );
document.write( "A = B + 2<BR>\n" );
document.write( "A+10 + B+10 = 2(A+B)<BR>\n" );
document.write( "A + B + 20 = 2A + 2B<BR>\n" );
document.write( "Substitute the value of A from the first equation into the second.<BR>\n" );
document.write( "(B+2) + B + 20 = 2(B+2) + 2B<BR>\n" );
document.write( "Add<BR>\n" );
document.write( "2B + 22 = 2B + 4 + 2B<BR>\n" );
document.write( "2B + 22 = 4B + 4<BR>\n" );
document.write( "Subtract 2B from each side<BR>\n" );
document.write( "22 = 2B + 4<BR>\n" );
document.write( "Subtract 4 from each side<BR>\n" );
document.write( "18 = 2B<BR>\n" );
document.write( "Divide each side by 2<BR>\n" );
document.write( "9 = B<BR>\n" );
document.write( "If younger brother is 9, then older brother is 11.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Let's prove it.<BR>\n" );
document.write( "\"The sum of their present ages will double in 10 years<BR>\n" );
document.write( "9+11 = 20<BR>\n" );
document.write( "In 10 years, 19+21=40<BR>\n" );
document.write( "Success! </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );