document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=4242>Question 4242</A>: <I><SPAN STYLE=\"word-break: break-all;\">  If a < b, then -a > -b.  Why? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #2493 by </B><A HREF=/tutors/aboutme.mpl?userid=ichudov><B>ichudov(507)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ichudov><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=ichudov><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=2493\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Start with: \r<BR>\n" );
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document.write( "a < b (a less than b)\r<BR>\n" );
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document.write( "that's the same as saying\r<BR>\n" );
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document.write( "b > a\r<BR>\n" );
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document.write( "Look at \r<BR>\n" );
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document.write( "b > a\r<BR>\n" );
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document.write( "subtract a from both sides:\r<BR>\n" );
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document.write( "b-a > a-a\r<BR>\n" );
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document.write( "b-a > 0\r<BR>\n" );
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document.write( "subtract b from both sides:\r<BR>\n" );
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document.write( "b-a-b > -b\r<BR>\n" );
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document.write( "b and -b cancel out\r<BR>\n" );
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document.write( "-a > -b\r<BR>\n" );
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document.write( "QED </SPAN>\n" );
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