document.write( "Question 53167: what are the values of w,x,y, and z in these equations?\r
\n" ); document.write( "\n" ); document.write( "1. w + x + y + z = 2
\n" ); document.write( "2. 2w - x - y +2z = 7
\n" ); document.write( "3. 2w + 3x + 2y - 2z = -2
\n" ); document.write( "4. 3w - 2x - y -3z = -2 \n" ); document.write( "
Algebra.Com's Answer #35635 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
:
\n" ); document.write( "1. w + x + y + z = 2
\n" ); document.write( "2. 2w - x - y +2z = 7
\n" ); document.write( "3. 2w + 3x + 2y - 2z = -2
\n" ); document.write( "4. 3w - 2x - y -3z = -2
\n" ); document.write( ":
\n" ); document.write( "This has to be solved as a matrix, a tedious task unless you use the matrix feature on your Ti83, or similar calc which I am doing here.
\n" ); document.write( ":
\n" ); document.write( "a 4 X 5 matrix:
\n" ); document.write( ":
\n" ); document.write( "+1 +1 +1 +1 +2
\n" ); document.write( "+2 -1 -1 +2 +7
\n" ); document.write( "+2 +3 +2 -2 -2
\n" ); document.write( "+3 -2 -1 -3 -2\r
\n" ); document.write( "\n" ); document.write( "Solution:
\n" ); document.write( "w = 1.2; x = 1.2; y = -2.2; z = 1.8
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\n" ); document.write( "Check solutions in the 1st equation:
\n" ); document.write( " 1.2 + 1.2 - 2.2 + 1.8 = +2
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\n" ); document.write( "Check solutions in the last equation:
\n" ); document.write( "3(1.2) - 2(1.2) - (-2.2) - 3(1.8) =
\n" ); document.write( "3.6 - 2.4 + 2.2 - 5.4 = -2
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