document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=980023>Question 980023</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if x - 4, 4 - x and x form an arithmetic progression, what is x? please help with a little explanation.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 #601227 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=601227\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (x-4),(4-x),x must have equal differences between them\r<BR>\n" );
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document.write( "Difference between first and second is (4-x)-(x-4)=4-2x+4=8-2x\r<BR>\n" );
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document.write( "The difference between second and third must equal 8-2x.  It is x-(4-x)=2x-4\r<BR>\n" );
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document.write( "Therefore, 8-2x=2x-4<BR>\n" );
document.write( "12=4x by adding 2x and 4 to both sides;<BR>\n" );
document.write( "x=3  ANSWER<BR>\n" );
document.write( "-1, 1, 3 are the numbers, and they form an arithmetic progression with difference 2 between each. </SPAN>\n" );
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