document.write( "Question 862218: im sapose to use aux matrix and let z be a
\n" ); document.write( "x+2y+2z=13
\n" ); document.write( "-2x+y+z=-1
\n" ); document.write( "-x+2y-z=-8 \n" ); document.write( "
Algebra.Com's Answer #522264 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
x+2y+2z=13
\n" ); document.write( "-2x+y+z=-1
\n" ); document.write( "-x+2y-z=-8
\n" ); document.write( "Add (2 * row1) to row2
\n" ); document.write( "1 2 2 13
\n" ); document.write( "0 5 5 25
\n" ); document.write( "-1 2 -1 8\r
\n" ); document.write( "\n" ); document.write( "Add (1 * row1) to row3
\n" ); document.write( "1 2 2 13
\n" ); document.write( "0 5 5 25
\n" ); document.write( "0 4 1 21\r
\n" ); document.write( "\n" ); document.write( "Divide row2 by 5
\n" ); document.write( "1 2 2 13
\n" ); document.write( "0 1 1 5
\n" ); document.write( "0 4 1 21\r
\n" ); document.write( "\n" ); document.write( "Add (-4 * row2) to row3
\n" ); document.write( "1 2 2 13
\n" ); document.write( "0 1 1 5
\n" ); document.write( "0 0 -3 1\r
\n" ); document.write( "\n" ); document.write( "Divide row3 by -3
\n" ); document.write( "1 2 2 13
\n" ); document.write( "0 1 1 5
\n" ); document.write( "0 0 1 -1/3\r
\n" ); document.write( "\n" ); document.write( "Add (-1 * row3) to row2
\n" ); document.write( "1 2 2 13
\n" ); document.write( "0 1 0 16/3
\n" ); document.write( "0 0 1 -1/3\r
\n" ); document.write( "\n" ); document.write( "Add (-2 * row3) to row1
\n" ); document.write( "1 2 0 41/3
\n" ); document.write( "0 1 0 16/3
\n" ); document.write( "0 0 1 -1/3\r
\n" ); document.write( "\n" ); document.write( "Add (-2 * row2) to row1
\n" ); document.write( "1 0 0 3
\n" ); document.write( "0 1 0 16/3
\n" ); document.write( "0 0 1 -1/3
\n" ); document.write( " \n" ); document.write( "
\n" );