document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=70506>Question 70506</A>: <I><SPAN STYLE=\"word-break: break-all;\">  1) y=x<BR>\n" );
document.write( "    y=-x                 \r<BR>\n" );
document.write( "\n" );
document.write( "2)y=-x<BR>\n" );
document.write( "   y=x+9\r<BR>\n" );
document.write( "\n" );
document.write( "i have 12 problems just like this, and the instuctions<BR>\n" );
document.write( "                         in the book i dont get. pleezzz help thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #50274 by </B><A HREF=/tutors/aboutme.mpl?userid=pleasuretohelp><B>pleasuretohelp(9)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=pleasuretohelp><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=50274\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=x<BR>\n" );
document.write( "y=-x\r<BR>\n" );
document.write( "\n" );
document.write( "Let's take your problem #1 as an example.\r<BR>\n" );
document.write( "\n" );
document.write( "First, you need to set both equations = 0.<BR>\n" );
document.write( "y = x becomes y - x = 0<BR>\n" );
document.write( "y = -x becomes y + x = 0\r<BR>\n" );
document.write( "\n" );
document.write( "Second, perform subtraction between those equations.<BR>\n" );
document.write( "y - x = 0<BR>\n" );
document.write( "y + x = 0<BR>\n" );
document.write( "__________ -<BR>\n" );
document.write( "0 - 2x = 0\r<BR>\n" );
document.write( "\n" );
document.write( "Third, simplify.<BR>\n" );
document.write( "0 - 2x = 0<BR>\n" );
document.write( "-2x = 0\r<BR>\n" );
document.write( "\n" );
document.write( "Fourth, divide both sides by -2.<BR>\n" );
document.write( "-2x/-2 = 0/-2<BR>\n" );
document.write( "x = 0\r<BR>\n" );
document.write( "\n" );
document.write( "Fifth, since we know that x = 0, recall that the original problem was:<BR>\n" );
document.write( "y=x<BR>\n" );
document.write( "y=-x<BR>\n" );
document.write( "Therefore, we can take either y=x or y=-x to substitute x as a 0.<BR>\n" );
document.write( "Either way, y = 0.<BR>\n" );
document.write( "So, the answer is x = 0 and y = 0.\r<BR>\n" );
document.write( "\n" );
document.write( "Why don't you try question #2 your own? If you have problems, post back the question and I'll be glad to help you :) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );