document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=418196>Question 418196</A>: <I><SPAN STYLE=\"word-break: break-all;\"> darrel is half as old as he will be when he is three times as old as he was four years ago. how old is he? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #292782 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=292782\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> darrel is half as old as he will be when he is three times as old as he was four years ago.<BR>\n" );
document.write( "how old is he?<BR>\n" );
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document.write( "let a = his present age<BR>\n" );
document.write( "a = .5(3(a-4))<BR>\n" );
document.write( "a = .5(3a - 12)<BR>\n" );
document.write( "a = 1.5a - 6<BR>\n" );
document.write( "6 = 1.5a - a<BR>\n" );
document.write( "6 = .5a<BR>\n" );
document.write( "a = 12 his present age<BR>\n" );
document.write( ":<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Check solution in original equation<BR>\n" );
document.write( "12 = .5(3(12-4))<BR>\n" );
document.write( "12 = .5(3*8); confirms our solution </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );