document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=881039>Question 881039</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a father is twice as old as his son. 12 years ago the father was 4 times as old as the son was then.<BR>\n" );
document.write( "Determine their present age.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #531941 by </B><A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><B>algebrahouse.com(1659)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><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=algebrahouse.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=531941\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = son's age<BR>\n" );
document.write( "2x = father's age   {he is twice as old as his son}\r<BR>\n" );
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document.write( "x - 12 = son's age 12 years ago<BR>\n" );
document.write( "2x - 12 = father's age 12 years ago\r<BR>\n" );
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document.write( "2x - 12 = 4(x - 12) {twelve years ago the father was 4 times his son}<BR>\n" );
document.write( "2x - 12 = 4x - 48 {used distributive property}<BR>\n" );
document.write( "-12 = 2x - 48 {subtracted 2x from each side}<BR>\n" );
document.write( "36 = 2x {added 48 to each side}<BR>\n" );
document.write( "x = 18 {divided each side by 2}<BR>\n" );
document.write( "2x = 36 {substituted 18, in for x, into 2x}\r<BR>\n" );
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document.write( "son is 18 <BR>\n" );
document.write( "father is 36<BR>\n" );
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