Given time series data on variables a, b, c, d, e, f, g, and h, is there a
way to create two new variables, X and Y, based on simple matrix inversion,
as in x = A^(-1)*b, where
matrix A = (a b \ c d)
matrix b = (e f \ g h)
matrix x = (X / Y).
(I understand that one can create X and Y via simple substitution, but with
larger systems of equations, this becomes quite cumbersome.)
Many thanks.
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