# Combinatorics involved in matrix

Discrete Mathematics Level 4

Let matrix $$A= \begin{bmatrix} x & y & -z \\ 1 & 2 & 3 \\ 1 & 1 & 2 \end{bmatrix}$$

where $$x,y,z \in \mathbb{N}$$. If $$|adj(adj(adj(adj.A)))|=4^8.5^{16}$$, then find the no. of positive integral solutions.

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