document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1151424>Question 1151424</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Picture yourself in a ’special’ world where x = -x Under this assumption, select the true statement/s:<BR>\n" );
document.write( "A) Every 2x can be ’exchanged’ for 0<BR>\n" );
document.write( "B) Every 5x can be ’exchanged’ for x<BR>\n" );
document.write( "C) Every x can be ’exchanged’ for -x<BR>\n" );
document.write( "D) x + x + x can be ’exchanged’ for x + x + -x<BR>\n" );
document.write( "E) Every 3x can be ’exchanged’ for x<BR>\n" );
document.write( "F) Every 3x can be ’exchanged’ for 2x + x<BR>\n" );
document.write( "G) None of these<BR>\n" );
document.write( "Note: can you please show me a solution not just the letters of the right answers, I want to know how to solve this type of questions. Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #773228 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=773228\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x becomes 2(-x) or -2x. That only works when x=0, so in general it does not work<BR>\n" );
document.write( "5x becomes -5x, and that is not x<BR>\n" );
document.write( "x can be exchanged for -x by definition, for it is given<BR>\n" );
document.write( "x+x+x can be exchanged for x+x+-x, since x can be exchanged for -x<BR>\n" );
document.write( "2x+x=3x, so this exchange works.  It would also work for 2x+ -x, although that is not asked.\r<BR>\n" );
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