document.write( "Question 1069956: 4x-4y+4z=-4
\n" ); document.write( "4x+y-2z=5
\n" ); document.write( "-3x-3y-4z=-16 \n" ); document.write( "

Algebra.Com's Answer #685060 by Alan3354(69443) $\"\"$ $\"About$

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4x-4y+4z=-4
\n" ); document.write( "4x+y-2z=5
\n" ); document.write( "-3x-3y-4z=-16
\n" ); document.write( "---------------
\n" ); document.write( "x -y+ z=-1 1st eqn divided by 4
\n" ); document.write( "4x+y-2z=5
\n" ); document.write( "-3x-3y-4z=-16
\n" ); document.write( "------------
\n" ); document.write( "x -y+ z=-1 1st eqn divided by 4
\n" ); document.write( "4x+y-2z =5
\n" ); document.write( "---------------------- Add
\n" ); document.write( "5x - z = 4 Eqn A
\n" ); document.write( "---
\n" ); document.write( "12x+3y-6z= 15 2nd eqn times 3
\n" ); document.write( "-3x-3y-4z=-16
\n" ); document.write( "----------------------- Add
\n" ); document.write( "9x - 10z = -1 Eqn B
\n" ); document.write( "50x -10z = 40 Eqn A times 10
\n" ); document.write( "----------------------------- Subtract
\n" ); document.write( "-41x = -41
\n" ); document.write( "x = 1
\n" ); document.write( "===========
\n" ); document.write( "5x - z = 4 Eqn A
\n" ); document.write( "5 - z = 5
\n" ); document.write( "z = 1
\n" ); document.write( "===========
\n" ); document.write( "x -y+ z=-1
\n" ); document.write( "1 - y + 1 = -1
\n" ); document.write( "y = 3
\n" ); document.write( "--> (1,3,1)
\n" ); document.write( " \n" ); document.write( "

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