document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=778609>Question 778609</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you evaluate 8z+20= -[2z+4].  ( \"[\" and \"]\" are suppose to be the straight lines, I just didn't have that on my keyboard  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #474813 by </B><A HREF=/tutors/aboutme.mpl?userid=psbhowmick><B>psbhowmick(878)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=psbhowmick><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=psbhowmick><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=474813\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 8z+20=-|2z+4|\r<BR>\n" );
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document.write( "This sign |...| is called mod or absolute value i.e. only positive value.\r<BR>\n" );
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document.write( "For 2z+4>0 i.e. z>-2<BR>\n" );
document.write( "8z+20=-(2z+4)<BR>\n" );
document.write( "8z+20=-2z-4<BR>\n" );
document.write( "10z=-24<BR>\n" );
document.write( "z=-2.4<BR>\n" );
document.write( "But since z>-2 so z cannot be equal to -2.4.\r<BR>\n" );
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document.write( "For 2z+4<0 i.e. z<-2<BR>\n" );
document.write( "8z+20=(2z+4)<BR>\n" );
document.write( "6z = -16<BR>\n" );
document.write( "z = -16/6=-8/3=-2.67\r<BR>\n" );
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document.write( "So the answer is -2.67. </SPAN>\n" );
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