document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=904605>Question 904605</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Express the average of three sisters in the terms of the age (a) of the firstborn (in years) if the second was born 5 years after the first and the third was born 5 years after the second.\r<BR>\n" );
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document.write( "I've tried it a bunch of different ways and can't figure out the correct answer. Please help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #548817 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=548817\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  the age  of the firstborn (in years) :<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a ALIGN=MIDDLE  ALT=\"a\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "the second was born <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5 ALIGN=MIDDLE  ALT=\"5\"   DISABLED_style= \"max-width:90%; height:auto;\" > years after the first (five years younger):<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a-5 ALIGN=MIDDLE  ALT=\"a-5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " and the third was born <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5 ALIGN=MIDDLE  ALT=\"5\"   DISABLED_style= \"max-width:90%; height:auto;\" > years after the second:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28a-5%29-5=a-10 ALIGN=MIDDLE  ALT=\"%28a-5%29-5=a-10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " the average of three sisters in the terms of the age:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28a%2B%28a-5%29%2B%28a-10%29%29%2F3=%283a-15%29%2F3=3a%2F3-15%2F3=a-5 ALIGN=MIDDLE  ALT=\"%28a%2B%28a-5%29%2B%28a-10%29%29%2F3=%283a-15%29%2F3=3a%2F3-15%2F3=a-5\"   DISABLED_style= \"max-width:90%; height:auto;\" >  </SPAN>\n" );
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