$\"\"$

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The equation is $\"\"$ .

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$\"\"$ (Divide each side by 2)

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$\"\"$ (Take log (base 5) of each side)

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$\"\"$ (Apply inverse property: $\"\"$ )

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$\"\"$ (Change-of-base formula: $\"\"$ )

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$\"\"$ . $\"\"$

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The solution of $\"\"$ .