document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=152304>Question 152304</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Billy's father is twice billy's age. Eleven years ago, Billy's father was 3 times Billy's age. How old is Billy </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #111970 by </B><A HREF=/tutors/aboutme.mpl?userid=munisa><B>munisa(5)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=munisa><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=111970\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the present age of Billy be 'x' and the present age of his father 'y'.<BR>\n" );
document.write( "Since Billy's father is twice as old as Billy,so\r<BR>\n" );
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document.write( "y=2x\r<BR>\n" );
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document.write( "11 years ago: <BR>\n" );
document.write( "Billy's age was x-11 years.<BR>\n" );
document.write( "Billy's father's age was y-11 years.<BR>\n" );
document.write( "Since father was thrice as old,therefore:\r<BR>\n" );
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document.write( "y-11=3*(x-11)\r<BR>\n" );
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document.write( "Substituting for y we get,\r<BR>\n" );
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document.write( "2x-11=3*(x-11)<BR>\n" );
document.write( "2x-11=3x-33<BR>\n" );
document.write( "x=22\r<BR>\n" );
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document.write( "Hence, Billy is 22 years old. </SPAN>\n" );
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