Question

3^x +3^(x-1) =54
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Answer 1

3^x - 3^(x-1) = 54

3^x-3^x.3^-1 = 54

3^x(1-1/3) = 54

3^x = 54 * 3/2

3^x=81

3^x=3^4

x = 4

Answer 2

Answer:

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