document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1104814>Question 1104814</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x-y-2z=4<BR>\n" );
document.write( "-x+2y+z=1<BR>\n" );
document.write( "-x+y-3z=11 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #719492 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=719492\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1) x -y -2z = 4<BR>\n" );
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document.write( "2) -x + 2y +z =1<BR>\n" );
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document.write( "3) -x +y -3z = 11<BR>\n" );
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document.write( "add equations 1 and 3<BR>\n" );
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document.write( "4) -5z = 15<BR>\n" );
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document.write( "solve equation 4 for z<BR>\n" );
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document.write( "z = -3<BR>\n" );
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document.write( "substitute for z in equations 1 and 2<BR>\n" );
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document.write( "x -y -2(-3) = 4<BR>\n" );
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document.write( "5) x -y = -2<BR>\n" );
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document.write( "-x +2y -3 = 1<BR>\n" );
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document.write( "6) -x +2y = 4<BR>\n" );
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document.write( "add equations 5 and 6<BR>\n" );
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document.write( "y = 2<BR>\n" );
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document.write( "so far we have y = 2 and z = -3<BR>\n" );
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document.write( "substitute for y and z in equation 1<BR>\n" );
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document.write( "x -2 -2(-3) = 4<BR>\n" );
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document.write( "x = 0<BR>\n" );
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document.write( "we have x=0, y=2 and z=-3<BR>\n" );
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document.write( "check our answer by substituting for x, y, z in equations 1, 2, 3<BR>\n" );
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document.write( "1) 0 -2 -2(-3) = 4<BR>\n" );
document.write( "4 = 4<BR>\n" );
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document.write( "2) -0 + 2(2) +(-3) = 1<BR>\n" );
document.write( "1 = 1<BR>\n" );
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document.write( "3) -0 +2 -3(-3) = 11<BR>\n" );
document.write( "11 = 11<BR>\n" );
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document.write( "our answer checks<BR>\n" );
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document.write( "    </SPAN>\n" );
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