document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1129578>Question 1129578</A>: <I><SPAN STYLE=\"word-break: break-all;\"> David has two younger sisters,Jane and Sally. Jane is 2 years older than Sally and David is 4 times older than Jane. Sally is z years old.\r<BR>\n" );
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document.write( "Write two equivalent expressions that represent David's age in terms of Sally's age, z, and explain how the two expressions relate to one another.\r<BR>\n" );
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document.write( "Which expression is more useful? Why?\r<BR>\n" );
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document.write( "I am in IEP and I don't understand half of my math. Hope you can help me. Thank You </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #746148 by </B><A HREF=/tutors/aboutme.mpl?userid=math_helper><B>math_helper(2461)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_helper><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=math_helper><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=746148\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sally is z year old,  given<br>\r<BR>\n" );
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document.write( "Jane is 2 years older than Sally —>  Jane is (z+2) years old  <br>\r<BR>\n" );
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document.write( "David is 4 times as old as Jane  (I reworded, the original wording didn't make sense) —>  David is 4*(z+2) years old<br>\r<BR>\n" );
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document.write( "These expressions relate the ages of Sally, Jane, and David by expressing those ages in terms of Sally's age.\r<BR>\n" );
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document.write( "I don't find any expression more useful than the other, perhaps Sally's age being z is simplest and easiest to work with.  For if someone tells you z they are giving you Sally's age straight away. <br> \r<BR>\n" );
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document.write( "Sally: z<BR>\n" );
document.write( "Jane: z+2<BR>\n" );
document.write( "David:  4(z+2)    </SPAN>\n" );
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