If \( \left[\begin{array}{ll}2 & 3 \\ 5 & 7\end{array}\right]\left[...

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If \( \left[\begin{array}{ll}2 & 3 \\ 5 & 7\end{array}\right]\left[\begin{array}{rr}1 & -3 \\ -2 & 4\end{array}\right]=\left[\begin{array}{ll}-4 & 6 \\ -9 & x\end{array}\right] \) find the value of \( x \).
\( P \)
(1) 15
(2) 14
(3) 13
(4) None of these
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