document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=802951>Question 802951</A>: <I><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( " 4 years ago, I was half the age I will be 7 years from now. How old am I?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #484055 by </B><A HREF=/tutors/aboutme.mpl?userid=thejackal><B>thejackal(72)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=thejackal><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=thejackal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=484055\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> very easy:<BR>\n" );
document.write( "Let my present age be x<BR>\n" );
document.write( "such that \"4 years ago\" = x - 4<BR>\n" );
document.write( "and \"half the age I will be 7 years from now\" = (x + 7)/2\r<BR>\n" );
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document.write( "thus:\r<BR>\n" );
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document.write( "x - 4 = (x + 7)/2<BR>\n" );
document.write( "2x - 8 = x + 7<BR>\n" );
document.write( "2x - x = 8 + 7<BR>\n" );
document.write( "x = 15\r<BR>\n" );
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document.write( "proof:\r<BR>\n" );
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document.write( "4 years ago = 15 - 4 = 11<BR>\n" );
document.write( "half the age I will be 7 years from now = (15 + 7)/2 = 11\r<BR>\n" );
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document.write( "QED </SPAN>\n" );
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