The exponential inequality is $\"\"$ .

Rewrite 27 as 3³.

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Apply power of a quotient property : $\"\"$ . $\"\"$

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Apply Property of Inequality for Exponential Functions : Let b > 1. Then b^x < b^y if and only if x < y.

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Add 2x to each side.

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Subtract 4 from each side.

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The solution set is $\"\"$ .