A = matrix(4,4,[2,3,-7,-1,3,-7,5,6,11,-4,-6,-1,5,3,1,2]);
A1 = matrix(4,4,[-3,3,-7,-1,7,-7,5,6,0,-4,-6,-1,11,3,1,2]);
A2 = matrix(4,4,[2,-3,-7,-1,3,7,5,6,11,0,-6,-1,5,11,1,2]);
A3 = matrix(4,4,[2,3,-3,-1,3,-7,7,6,11,-4,0,-1,5,3,11,2]);
A4 = matrix(4,4,[2,3,-7,-3,3,-7,5,7,11,-4,-6,0,5,3,1,11]);
print "det(A)" ,A.det()
print "det(A_1)" ,A1.det()," " , "x_1 =", A1.det()/A.det()
print "det(A_2)" ,A2.det()," " , "x_2 =", A2.det()/A.det()
print "det(A_3)" ,A3.det()," " , "x_3 =", A3.det()/A.det()
print "det(A_4)" ,A4.det()," " , "x_4 =", A4.det()/A.det()
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det(A) -2712
det(A_1) -2712 x_1 = 1
det(A_2) -2712 x_2 = 1
det(A_3) -2712 x_3 = 1
det(A_4) -2712 x_4 = 1
det(A) -2712
det(A_1) -2712 x_1 = 1
det(A_2) -2712 x_2 = 1
det(A_3) -2712 x_3 = 1
det(A_4) -2712 x_4 = 1
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