Question

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Answer 1

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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Answer 2

☘⫷❥ᴀ᭄n §₩ΣR⫸☘

5n−4 ×2n−5 =5

5×2 (n−4)+(n−5) =5

10 (n−4+n−5) =5

10 (2n−9) =5

2n−9= 5/10

2n−9=1/2

2n= 1/2 +9

2n= 1+18/2

2n= 19/2

n= (19/2)/2

n= 19/2 × 1/2

n= 19/4

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