document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1065336>Question 1065336</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jane is now twice as old as Joy. In four years, she will be ten years older than Joy. Find their present ages.<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 #680489 by </B><A HREF=/tutors/aboutme.mpl?userid=math_helper><B>math_helper(2461)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_helper><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=math_helper><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=680489\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "  J = Jane's age<BR>\n" );
document.write( "  K = Joy's age<BR>\n" );
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document.write( "   J = 2K   (1)<BR>\n" );
document.write( "  J+4 = (K+4)+10   (2)<BR>\n" );
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document.write( "Substitute 2K for J (from (1)) into (2): <BR>\n" );
document.write( "   2K+4 = K+4+10<BR>\n" );
document.write( "         K = 10  —>  from (1): J = 2K = 20<BR>\n" );
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document.write( "Ans:<BR>\n" );
document.write( " Joy is 10,  Jane is 20<BR>\n" );
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document.write( "Check:<BR>\n" );
document.write( "               Joy's age in 4 years:   10+4 = 14<BR>\n" );
document.write( "               Jane's age in 4 years:   20+4 = 24 = 14+10  (ok, 10 more than Joy's)<BR>\n" );
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