# Example 2: The DeWright Company with(LinearAlgebra): # Vars: x1 x2 x3 s1 e1 s2 e2 s3 e3 (and rhs) A:=<<0,12,5,5>|<0,9,3,7>|<0,15,4,8>|<5,1,0,0>|<0,-1,0,0>|<4,0,1,0>|<2,0,-1,0>|<0,0,0,1>|<3,0,0,-1>|<0,125,40,55>>;

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# A2:=RowOperation(A,[1,2],-5): A3:=RowOperation(A2,[1,3],-4);

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# evalf([125/9,40/4,55/8]);

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# A4:=RowOperation(A3,4,1/8): A5:=RowOperation(A4,[1,4],91): A6:=RowOperation(A5,[2,4],-15): A7:=RowOperation(A6,[3,4],-4);

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# evalf([(175/8)/(21/8), (25/2)/(5/2), (55/8)/(5/8)]);

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# A8:=RowOperation(A7,3,2/5): A9:=RowOperation(A8,[1,3],185/8): A10:=RowOperation(A9,[2,3],-21/8): A11:=RowOperation(A10,[4,3],-5/8);

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evalf([(35/4)/(27/20),5/(1/5)]);

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# A12:=RowOperation(A11,2,20/27): A13:=RowOperation(A12,[1,2],15/4): A14:=RowOperation(A13,[3,2],-1/5): A15:=RowOperation(A14,[4,2],1/4);

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evalf([(175/27)/(7/9), (145/27)/(4/9)]);

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A16:=RowOperation(A15,2,9/7): A17:=RowOperation(A16,[1,2],1/3): A18:=RowOperation(A17,[3,2],5/9): A19:=RowOperation(A18,[4,2],-4/9);

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