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Pls do the need.....​

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ANSWER:

{5}^{ n- 4} \times {2}^{n - 5} = 5 \\ {5 \times 2}^{(n - 4) + (n - 5)} = 5 \\ {10}^{(n - 4 + n - 5)} = 5 \\ {10}^{(2n - 9)} = 5 \\ 2n - 9 = \frac{5}{10} \\ 2n - 9 = \frac{1}{2} \\ 2n = \frac{1}{2} + 9 \\ 2n = \frac{1 + 18}{2} \\ 2n = \frac{19}{2} \\ n = \frac{ \frac{19}{2} }{2} \\ n = \frac{19}{2} \times \frac{1}{2} \\ n = \frac{19}{4}

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