Find the Values of the Variables for Which the Statement

Find the values of the variables for which the statement is true, if possible.
- $$\left[ \begin{array} { c c } 1 & - 3 \\x & 0\end{array} \right] = \left[ \begin{array} { c c } \mathrm { m } - 4 & \mathrm { n } + 4 \\7 & 0\end{array} \right]$$

A) $\mathrm { m } = - 7 ; \mathrm { n } = 5 ; \mathrm { x } = 0$
B) $\mathrm { m } = 1 ; \mathrm { n } = - 3 ; \mathrm { x } = 7$
C) $m = 5 ; n = - 7 ; x = 7$
D) $\mathrm { m } = - 5 ; \mathrm { n } = + 7 ; \mathrm { x } = - 7$

Correct Answer:

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