document.write( "Question 745505: Please solve this system completely and show all work. Solve for x, y, and z.\r
\n" ); document.write( "\n" ); document.write( "x + 2y + z = 7
\n" ); document.write( "3x - y + z = -12
\n" ); document.write( "4x + 3y -2z = 9 \n" ); document.write( "
Algebra.Com's Answer #453862 by sachi(548)\"\" \"About 
You can put this solution on YOUR website!
x + 2y + z = 7...............1
\n" ); document.write( "3x - y + z = -12..............2
\n" ); document.write( "4x + 3y -2z = 9...............3
\n" ); document.write( "eqn 2 X 2+eqn 1
\n" ); document.write( "x + 2y + z = 7...............1
\n" ); document.write( "6x - 2y + 2z = -24..............3
\n" ); document.write( "---------------------
\n" ); document.write( "7x +3z =-17.............5\r
\n" ); document.write( "\n" ); document.write( "eqn 2X 3 +eqn 3
\n" ); document.write( "9x -3y +3z = -36..............6
\n" ); document.write( "4x + 3y -2z = 9...............3
\n" ); document.write( "-----------------------
\n" ); document.write( "13x +z=-27..............7\r
\n" ); document.write( "\n" ); document.write( "eq5 - eqn 7 X 3
\n" ); document.write( "7x +3z =-17.............5
\n" ); document.write( "39x +3z=-81..............9
\n" ); document.write( "- - +
\n" ); document.write( "-----------
\n" ); document.write( "-32x=64
\n" ); document.write( "or x=-2\r
\n" ); document.write( "\n" ); document.write( "from eqn 5
\n" ); document.write( "7*(-2)+z=-17
\n" ); document.write( "or z=-17+14=-3\r
\n" ); document.write( "\n" ); document.write( "from eqn 1
\n" ); document.write( "-2 + 2y -3 = 7.
\n" ); document.write( "or 2y=7+5=12
\n" ); document.write( "or y=6\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );