consider the systems of linear equations given via the (combined) augmented matrix
(-12, -6, -13, 84, 0, 0, -1, 0
-2, 0, -2, 13, 0, 0, 0, 1
1, 0, 1, -6, -4, 0, 0, 0
26, 13, 28, -181, 0, 4, 0, 0)
which can be reduced to the Echelon form
(1, 0, 0, 0, -4, 24, -13, 0
0, 1, 0, 0, -0, 4, -2, 1
0, 0, 1, 0, -48, -24, 13, 6
0, 0, 0, 1, -8, 0, -0, 1)
Tasks
What is the inverse of the coefficient matrix?
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