document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=348158>Question 348158</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I can figure out the answer to the problem  Anna is 18, Dennis is 9 and Curtis is 5.. but what the teacher wants is to \"Define a variable, and then write an equation for each problem\".<BR>\n" );
document.write( "The problem is Anna is twice as old as her brother Dennis, who is 4 years older thean their brother Curtis.  The sum of their ages is 32. How old is Anna?\r<BR>\n" );
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document.write( "Need to define a variable and then write an equation and not sure how to do that?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #248961 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=248961\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The problem is Anna is twice as old as her brother Dennis, who is 4 years older <BR>\n" );
document.write( "than their brother Curtis.<BR>\n" );
document.write( " The sum of their ages is 32. How old is Anna?<BR>\n" );
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document.write( "let a = Anna's age<BR>\n" );
document.write( "let d = Dennis's age<BR>\n" );
document.write( "let c = Curtis's age<BR>\n" );
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document.write( "Write an equation for each statement, we will try to get everything in terms of d:<BR>\n" );
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document.write( "\"Anna is twice as old as her brother Dennis\"<BR>\n" );
document.write( "a = 2d<BR>\n" );
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document.write( "\"who is 4 years older than their brother Curtis.\"<BR>\n" );
document.write( "d = c + 4<BR>\n" );
document.write( "Subtract 4 from both sides, and we have<BR>\n" );
document.write( "c = d-4<BR>\n" );
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document.write( "\" The sum of their ages is 32.\"<BR>\n" );
document.write( "a + d + c = 32<BR>\n" );
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document.write( "Replace a with 2d, and replace c with (d-4)<BR>\n" );
document.write( "2d + d + (d-4) = 32<BR>\n" );
document.write( "2d + d + d = 32 + 4<BR>\n" );
document.write( "4d = 36<BR>\n" );
document.write( "d = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=36%2F4 ALIGN=MIDDLE  ALT=\"36%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d = 9 yrs is Denni's age<BR>\n" );
document.write( "then<BR>\n" );
document.write( "a = 2(9) = 18 is Anna's age\r<BR>\n" );
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