document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=137173>Question 137173</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jack is 15 years old, and his sister, Jane is 5 years old. In how many years will jack be twice as old as Jane? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #100368 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=100368\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Jack=15<BR>\n" );
document.write( "Jane=5<BR>\n" );
document.write( "15+x=2(5+x)<BR>\n" );
document.write( "15+x=10+2x<BR>\n" );
document.write( "x-2x=10-15<BR>\n" );
document.write( "-x=-5<BR>\n" );
document.write( "x=5 years from now Jack will be twice as old as Jane.<BR>\n" );
document.write( "proof:<BR>\n" );
document.write( "15+5=2(5+5)<BR>\n" );
document.write( "20=2*10<BR>\n" );
document.write( "20=20<BR>\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );