If $ A = \begin{bmatrix} 3 & -1 \\ 1 & 2 \end{bmatrix} $, $ B = \begin{bmatrix} 3 \\ 1 \end{bmatrix} $, $ C = \begin{bmatrix} 1 \\ -2 \end{bmatrix} $ and `AX=3B+2C`, then find the matrix `X`


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