document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=163419>Question 163419</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if a+b+c+d=2001 and b+d=2002, what is the value of a-b+c-d? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #120777 by </B><A HREF=/tutors/aboutme.mpl?userid=orca><B>orca(409)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=orca><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=120777\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a - b + c - d<BR>\n" );
document.write( "= a -b + c - d + (b + d - b - d)<BR>\n" );
document.write( "= a + b + c + d -2b - 2d<BR>\n" );
document.write( "= (a + b + c + d) - 2(b + d)<BR>\n" );
document.write( "= 2001 - 2*2002<BR>\n" );
document.write( "= -2003<BR>\n" );
document.write( " </SPAN>\n" );
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