document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1120198>Question 1120198</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I go about setting up and solving this question?\r<BR>\n" );
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document.write( "Eight years ago, Heather was twice as old as her brother David. Today, she is 13 years older than he is. How old is she?\r<BR>\n" );
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document.write( "This is how I started but I know this is not right.<BR>\n" );
document.write( "2x-8+13=x-8\r<BR>\n" );
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document.write( "Thanks in advance. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #735869 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=735869\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Write an equation for each statement<BR>\n" );
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document.write( "Eight years ago, Heather was twice as old as her brother David.<BR>\n" );
document.write( "h - 8 = 2(d-8)<BR>\n" );
document.write( "h - 8 = 2d - 16<BR>\n" );
document.write( "h = 2d - 16 + 8<BR>\n" );
document.write( "h = 2d - 8<BR>\n" );
document.write( " Today, she is 13 years older than he is. How old is she?<BR>\n" );
document.write( "h = d + 13 <BR>\n" );
document.write( "h = h, therefore<BR>\n" );
document.write( "2d - 8 = d + 13<BR>\n" );
document.write( "2d - d = 13 + 8<BR>\n" );
document.write( "d = 21 is Davids age<BR>\n" );
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document.write( "You can find Heather's age<BR>\n" );
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document.write( "Check your solutions in both statements </SPAN>\n" );
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