document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=597340>Question 597340</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jack is now four times as old as his dog. In six years he'll be only twice as old as his dog. How old is Jack? How old is his dog? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #378132 by </B><A HREF=/tutors/aboutme.mpl?userid=dfrazzetto><B>dfrazzetto(283)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dfrazzetto><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=dfrazzetto><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=378132\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "J = 4D\r<BR>\n" );
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document.write( "J + 6 = 2(D+6)\r<BR>\n" );
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document.write( "substituting, J = 4D:\r<BR>\n" );
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document.write( "4D + 6 = 2D + 12\r<BR>\n" );
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document.write( "2D = 6\r<BR>\n" );
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document.write( "D = 3\r<BR>\n" );
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document.write( "J = 12\r<BR>\n" );
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document.write( "CHECK:\r<BR>\n" );
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document.write( "12 = 4(3)\r<BR>\n" );
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document.write( "12 + 6 = 2(3 + 6)<BR>\n" );
document.write( "18 = 2(9) = 18  </SPAN>\n" );
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