document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1069154>Question 1069154</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A father who is 42 years old has a son and a daughter. The daughter is three times as old as the son. In 10 years the sum of all their ages will be 100 years. How old are the two siblings at present? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #684386 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</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=684386\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s, son<BR>\n" );
document.write( "d, daugher\r<BR>\n" );
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document.write( "The description as a system of equations:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28d=3s%2Cs%2B10%2Bd%2B10%2B42%2B10=100%29 ALIGN=MIDDLE  ALT=\"system%28d=3s%2Cs%2B10%2Bd%2B10%2B42%2B10=100%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2Bd=100-42-30 ALIGN=MIDDLE  ALT=\"s%2Bd=100-42-30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2Bd=28 ALIGN=MIDDLE  ALT=\"s%2Bd=28\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "substitute for d;<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2B3s=28 ALIGN=MIDDLE  ALT=\"s%2B3s=28\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28s=7%29 ALIGN=MIDDLE  ALT=\"highlight%28s=7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28d=21%29 ALIGN=MIDDLE  ALT=\"highlight%28d=21%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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