document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=401566>Question 401566</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Problem:\r<BR>\n" );
document.write( "\n" );
document.write( "5x - 4y + z  when x = 6, y = -5 and z = 3\r<BR>\n" );
document.write( "\n" );
document.write( "Answer:<BR>\n" );
document.write( "53\r<BR>\n" );
document.write( "\n" );
document.write( "The way I wrote it is:<BR>\n" );
document.write( "5(6) - 4(-5) + 3<BR>\n" );
document.write( "30 - (-20) + 3<BR>\n" );
document.write( "= 13\r<BR>\n" );
document.write( "\n" );
document.write( "Question:<BR>\n" );
document.write( "Why did the minus turn to positive and the negative 20 turn positive 20?<BR>\n" );
document.write( "Is there a time that this does not occur?\r<BR>\n" );
document.write( "\n" );
document.write( "Please, keep this simple.  I am already having a difficult time. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #284192 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=284192\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two negative signs essentially cancel out, leaving a positive. Here's why:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The negative of a number, x, is a number that satisfies \"x plus the negative of x equals zero.\" Therefore the negative of x is -x. The negative of -x is the number such that, when added to -x, produces 0. Here, x is the number that satisfies, since (-x) + x = 0, so -(-x) = x. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );