Where is wrong 2?

Statement One: You are trying to evaluate $\displaystyle \begin{vmatrix} 9 & 8 & 7 \\ 5 & 4 & 6 \\ 1 & 2 & 3 \end{vmatrix}$ .

Statement Two: Then, you think that $\displaystyle \begin{pmatrix} 9 & 8 & 7 \\ 5 & 4 & 6 \\ 1 & 2 & 3 \end{pmatrix} = \begin{pmatrix} 5 & 3 & 4 \\ 4 & 5 & 5 \\ 3 & 4 & 3 \end{pmatrix} + \begin{pmatrix} 4 & 5 & 3 \\ 1 & -1 & 1 \\ -2 & -2 & 0 \end{pmatrix}$

Statement Three: $\therefore \displaystyle \begin{vmatrix} 9 & 8 & 7 \\ 5 & 4 & 6 \\ 1 & 2 & 3 \end{vmatrix} = \begin{vmatrix} 5 & 3 & 4 \\ 4 & 5 & 5 \\ 3 & 4 & 3 \end{vmatrix} + \begin{vmatrix} 4 & 5 & 3 \\ 1 & -1 & 1 \\ -2 & -2 & 0 \end{vmatrix}$

Statement Four: $\displaystyle \implies (-30) = (-12) + (-14)$

Statement Five: $\displaystyle \therefore -30 = -26 ?$

Which of these statements is the start of the mistake in the said argument?

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Notations: $| A |$ is the determinant of the matrix A while $\big( A \big )$ is the matrix A itself.