document.write( "Question 766599: Use the elimination method to solve the system of equation that has four variables.\r
\n" ); document.write( "\n" ); document.write( "w+x-y+z=0
\n" ); document.write( "w-2x-2y-z=-5
\n" ); document.write( "w-3x-y+z=4
\n" ); document.write( "2w-x-y+3z=7\r
\n" ); document.write( "\n" ); document.write( "w=?
\n" ); document.write( "x=?
\n" ); document.write( "y=?
\n" ); document.write( "z=?
\n" ); document.write( "

Algebra.Com's Answer #467056 by Alan3354(69443)\"\" \"About 
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Use the elimination method to solve the system of equation that has four variables.
\n" ); document.write( "w+x-y+z=0
\n" ); document.write( "w-2x-2y-z=-5
\n" ); document.write( "w-3x-y+z=4
\n" ); document.write( "2w-x-y+3z=7
\n" ); document.write( "==============
\n" ); document.write( "Eliminated the z terms 1st.
\n" ); document.write( "Add eqn 1 & 2
\n" ); document.write( "Subtract eqn 1 & 3
\n" ); document.write( "Multiply eqn 1 by 3, then subtract from eqn 4.
\n" ); document.write( "----------
\n" ); document.write( "z is eliminated. You'll have 3 eqns in w, x & y.
\n" ); document.write( "Pick w, x or y and eliminate one of them.
\n" ); document.write( "etc.
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