document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=507511>Question 507511</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve:\r<BR>\n" );
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document.write( "John is 4 years older than his sister, and 6 years ago he was twice his sisters age then.  How old is each now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #340509 by </B><A HREF=/tutors/aboutme.mpl?userid=oberobic><B>oberobic(2304)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oberobic><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=340509\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> J = John's current age<BR>\n" );
document.write( "S = John's sister's current age<BR>\n" );
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document.write( "John is 4 years older than his sister<BR>\n" );
document.write( "J = S+4<BR>\n" );
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document.write( "6 years ago their ages were:<BR>\n" );
document.write( "J-6<BR>\n" );
document.write( "S-6<BR>\n" );
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document.write( "6 years ago John was twice as old as his sister<BR>\n" );
document.write( "J-6 = 2(S-6)<BR>\n" );
document.write( "J = 2S -12 +6<BR>\n" );
document.write( "J = 2S -6<BR>\n" );
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document.write( "substitute<BR>\n" );
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document.write( "J = S+4<BR>\n" );
document.write( "2S -6 = S+4<BR>\n" );
document.write( "S = 10<BR>\n" );
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document.write( "J = S+4<BR>\n" );
document.write( "J = 14<BR>\n" );
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document.write( "Check the solution to be sure it is the answer.<BR>\n" );
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document.write( "Six years ago...<BR>\n" );
document.write( "J-6 = 8<BR>\n" );
document.write( "S-6 = 4<BR>\n" );
document.write( "8 = 2*4<BR>\n" );
document.write( "Correct.<BR>\n" );
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document.write( "Answer: John is 14 years old, and his sister is 10.<BR>\n" );
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document.write( "Done. </SPAN>\n" );
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