Algebra-2

Question Analysis
This problem evaluates the understanding of solving exponential equations by expressing both sides with the same base.

Key Concept Explanation
When the bases are the same, set the exponents equal to each other. Here, 81 can be expressed as a power of 3.

Step-by-step Solution
1. Rewrite 81 as a power of 3: .
2. Substitute this into the equation: .
3. Set the exponents equal:

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