document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=774061>Question 774061</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sarah is 1/7 as old as Donald. In 9 years, Sarah's age will be 6 years more than 1/6 of Donald's age. How old are Sarah and Donald now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #472025 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=472025\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s = Sarah's age<BR>\n" );
document.write( "d = Donald's age\r<BR>\n" );
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document.write( "_______________now____________________9 years from now<BR>\n" );
document.write( "Sarah__________(1/7)d_________________s+9<BR>\n" );
document.write( "Donald_________d______________________d+9\r<BR>\n" );
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document.write( "In 9 years, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2B9=6%2B%281%2F6%29%28d%2B9%29 ALIGN=MIDDLE  ALT=\"s%2B9=6%2B%281%2F6%29%28d%2B9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s=%281%2F7%29d ALIGN=MIDDLE  ALT=\"s=%281%2F7%29d\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Think first how that makes sense.<BR>\n" );
document.write( "...<BR>\n" );
document.write( "When understood, simplify the \"(1/6)\"-\"+9\" equation, substitute for s, and solve first for s, before solving for d.\r<BR>\n" );
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document.write( "s=-3+(1/6)(d+9)<BR>\n" );
document.write( "6s=-18+d+9<BR>\n" );
document.write( "6s=d-9<BR>\n" );
document.write( "substitute...<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6%281%2F7%29d=d-9 ALIGN=MIDDLE  ALT=\"6%281%2F7%29d=d-9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "6d=7d-63<BR>\n" );
document.write( "6d-7d=-63<BR>\n" );
document.write( "d=63___________Donald's age<BR>\n" );
document.write( "Now find s,<BR>\n" );
document.write( "s=d/7<BR>\n" );
document.write( "s=63/7<BR>\n" );
document.write( "s=9___________Sarah's age\r<BR>\n" );
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document.write( "Sarah is 9 and Donald is 63 </SPAN>\n" );
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