document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=562331>Question 562331</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average age of 5  children is 8 years.  If the age of the father be included, the average is <BR>\n" );
document.write( "increased by 7 years.  Find the age of the father. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #364546 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=364546\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The average age of 5  children is 8 years.  If the age of the father be included, the average is <BR>\n" );
document.write( "increased by 7 years.  Find the age of the father.<BR>\n" );
document.write( "Let S = the sum of the children's ages<BR>\n" );
document.write( "The average of the 5 children's ages = 8 = S/5 -> S = 40<BR>\n" );
document.write( "Let the father's age = f<BR>\n" );
document.write( "The average, including the father = 8 + 7 = 15 = (S+f)/6<BR>\n" );
document.write( "Since S=40, we have<BR>\n" );
document.write( "15 = (40+f)/6 <BR>\n" );
document.write( "f = 90 - 40 = 50<BR>\n" );
document.write( "So the father is 50 years old\r<BR>\n" );
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