Ononot — Find x if \begin{pmatrix} x & 2 \\ 1 & 3 \end{pmatrix} = \be

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Find $x$ if $\begin{pmatrix} x & 2 \\ 1 & 3 \end{pmatrix} = \begin{pmatrix} 5 & 2 \\ 1 & 3 \end{pmatrix}$ .