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Matrix (Page: 5)
Question No: # 49
If $ \begin{pmatrix} 2 & 1 \\ 3 & 4 \end{pmatrix} \begin{pmatrix} x \\ y \end{pmatrix} = \begin{pmatrix} 1 \\ -1 \end{pmatrix} $ then find the value of `x` and `y`.
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