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81^x+2=3^3x-1
We move all terms to the left:
81^x+2-(3^3x-1)=0
We get rid of parentheses
81^x-3^3x+1+2=0
We add all the numbers together, and all the variables
81^x-3^3x+3=0
We move all terms containing x to the left, all other terms to the right
81^x-3^3x=-3
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