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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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