Question:
Mark the tick against the correct answer in the following:
If $\left|\begin{array}{ccc}5 & 3 & -1 \\ -7 & x & 2 \\ 9 & 6 & -2\end{array}\right|=0$ then $x=?$
A. 0
B. 6
C. $-6$
D. 9
Solution:
To find: Value of $x$
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