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1/27=81^x
We move all terms to the left:
1/27-(81^x)=0
We multiply all the terms by the denominator
-81^x*27+1=0
Wy multiply elements
-2187x+1=0
We move all terms containing x to the left, all other terms to the right
-2187x=-1
x=-1/-2187
x=1/2187
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