document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=336059>Question 336059</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a father is twice as old as his son. 20 years ago, the age of the father was 12 times the age of the son. the present age of the father is. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #241004 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=241004\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let son be x years<BR>\n" );
document.write( "father = 2x<BR>\n" );
document.write( "..<BR>\n" );
document.write( "20 years ago<BR>\n" );
document.write( "son = x-20<BR>\n" );
document.write( "father = 2x-20<BR>\n" );
document.write( "..<BR>\n" );
document.write( "2x-20=12*(x-20)<BR>\n" );
document.write( "2x-20 = 12x -240<BR>\n" );
document.write( "add 20 to both sides<BR>\n" );
document.write( "2x = 12x-240+20<BR>\n" );
document.write( "2x=12x-220<BR>\n" );
document.write( "add -12x to both sides<BR>\n" );
document.write( "2x-12x= 12x-12x-220<BR>\n" );
document.write( "-12x+2x= -240+20<BR>\n" );
document.write( "-10x= -220<BR>\n" );
document.write( "divide by -10<BR>\n" );
document.write( "x= -220/-10<BR>\n" );
document.write( "x=22 son's age<BR>\n" );
document.write( "Father's age = 2*22 = 44 years<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );