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gauss-elimination method 4x 1 +2x 2 +x 3 =11 -x 1 +4x 2 -3x 3 =-8 x 1 -x 2 +4x=1

gauss-elimination method

4x1+2x2+x3=11

-x1+4x2-3x3=-8

x1-x2+4x=1

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