Solve the following system of equations using Gaussian elimination. Write the anwser as ordered triples and please show steps.
2x+y+2z=18
x-y+2z=9
x+2y-z=6
2x + y + 2z = 18
x - y + 2z = 9
x + 2y - z= 6
solution is
( x, y , z ) = ( 5 , 2 , 3 )
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