document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=164128>Question 164128</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Billy is twice as old as his son. In 10 years, the ratio of their age will be 3:5. find their age.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #120911 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=120911\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (x+10)/(2x+10)=3/5<BR>\n" );
document.write( "3(2x+10)=5(x+10)<BR>\n" );
document.write( "6x+30=5x+50<BR>\n" );
document.write( "6x-5x=50-30<BR>\n" );
document.write( "x=20 the son'e age now.<BR>\n" );
document.write( "2*20=40 dads age now.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "(20+10)/(40+10)=3/5<BR>\n" );
document.write( "30/50=3/5<BR>\n" );
document.write( "3/5=3/5\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );