document.write( "Question 250951: solve the system of equtaions by gauss-elimination method
\n" ); document.write( "x+y+z=9
\n" ); document.write( "x-2y+3z=8
\n" ); document.write( "2x+y-z=3\r
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Algebra.Com's Answer #182759 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Add 1 and 3,
\n" ); document.write( " $\"x%2By%2Bz%2B2x%2By-z=9%2B3+\"$
\n" ); document.write( "4. $\"3x%2B2y=12\"$
\n" ); document.write( "Multiply 3 by 3 and add to 2,
\n" ); document.write( " $\"6x%2B3y-3z%2Bx-2y%2B3z=9%2B8\"$
\n" ); document.write( "5. $\"7x%2By=17\"$
\n" ); document.write( "Multiply 5 by -2 and add to 4.
\n" ); document.write( " $\"-14x-2y%2B3x%2B2y=-34%2B12\"$
\n" ); document.write( " $\"-11x=-22\"$
\n" ); document.write( " $\"x=2\"$
\n" ); document.write( "Now work backwards,
\n" ); document.write( " $\"7x%2By=17\"$
\n" ); document.write( " $\"14%2By=17\"$
\n" ); document.write( " $\"y=3\"$
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\n" ); document.write( " $\"x%2By%2Bz=9\"$
\n" ); document.write( " $\"2%2B3%2Bz=9\"$
\n" ); document.write( " $\"z=4\"$
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\n" ); document.write( "(x,y,z)=(2,3,4)
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