document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=246351>Question 246351</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this linear system with three variables. \r<BR>\n" );
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document.write( "2x-y+2z=-21<BR>\n" );
document.write( "x+5y-z=25<BR>\n" );
document.write( "-3x+2+4z=6\r<BR>\n" );
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document.write( "I had attempted to replicate the example.\r<BR>\n" );
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document.write( "6x-3y+6z=-62<BR>\n" );
document.write( "-6x+4y+8z=12<BR>\n" );
document.write( "y+14z=40\r<BR>\n" );
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document.write( "3x+5y-3z=75<BR>\n" );
document.write( "-3x+2y+4z=6<BR>\n" );
document.write( "17y-z=81\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #190226 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=190226\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x-y+2z=-21<BR>\n" );
document.write( "x+5y-z=25<BR>\n" );
document.write( "-3x+2+4z=6 <BR>\n" );
document.write( "I had attempted to replicate the example. <BR>\n" );
document.write( "6x-3y+6z=-62 ** = -63, not -62<BR>\n" );
document.write( "-6x+4y+8z=12<BR>\n" );
document.write( "-------------- Add<BR>\n" );
document.write( "y+14z=40 ** -51<BR>\n" );
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document.write( "3x+5y-3z=75  ** + 15y, not 5y<BR>\n" );
document.write( "-3x+2y+4z=6<BR>\n" );
document.write( "17y-z=81 --> 17y + z = 81  ** not -z<BR>\n" );
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document.write( "Your method is good, but you made some errors.<BR>\n" );
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document.write( "y + 14z = -51  --> y = -14z - 51<BR>\n" );
document.write( "17y + z = 81<BR>\n" );
document.write( "----------- Since y has a coeff of 1, use substitution.<BR>\n" );
document.write( "17*(-14z-51) + z = 81<BR>\n" );
document.write( "-237z - 867 = 81<BR>\n" );
document.write( "-237z = 948<BR>\n" );
document.write( "z = -4<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "y = 5<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Sub to find x\r<BR>\n" );
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