document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1106519>Question 1106519</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of the ages of Derek and Andy is 50. In five years time, the age of Andy will be four times the age of Derek now. how old is each boy?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #721524 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13206)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=721524\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The other tutor misread the problem....<br><BR>\n" );
document.write( "Let x be Derek's age; then Andy's age is (50-x).<BR>\n" );
document.write( "In 5 years, Derek's age will be (x+5); Andy's will be (55-x).<br><BR>\n" );
document.write( "The problem says Andy's age in 5 years will be 4 times Derek's current age:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=55-x+=+4x%29 ALIGN=MIDDLE  ALT=\"55-x+=+4x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=55+=+5x ALIGN=MIDDLE  ALT=\"55+=+5x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=11+=+x ALIGN=MIDDLE  ALT=\"11+=+x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Derek's age is x=11; Andy's age is 50-x = 39. </SPAN>\n" );
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