document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=140226>Question 140226</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0534386172/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I need an equation for this problem, the sum of the present ages of Eric and his father is 58 years.  In 10 years his father will be twice as old as Ericwill be at that time.  Find their present ages. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #102151 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=102151\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"the sum of the present ages of Eric and his father is 58 years\" __ e+f=58 __ f=58-e\r<BR>\n" );
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document.write( "\"In 10 years his father will be twice as old as Ericwill be at that time\" __ 2(e+10)=f+10\r<BR>\n" );
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document.write( "substituting __ 2e+20=58-e+10 __ 3e=48 __ e=16\r<BR>\n" );
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document.write( "substituting __ 16+f=58 __ f=42 </SPAN>\n" );
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