Question

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Answer 1

Step-by-step explanation:

${ - 5}^{4} \times { - 5}^{12} = { - 5}^{16} \\ \\ { - 5}^{3x} \times { - 5}^{ - 1} = { - 5}^{3x - 1} \\ \\ - {5}^{16} = { - 5}^{3x - 1} \\ \\ 16 = 3x - 1 \\ 3x = 17 \\ x = \frac{17}{3}$