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(9^4+x)(81^x)=1/3
We move all terms to the left:
(9^4+x)(81^x)-(1/3)=0
We add all the numbers together, and all the variables
(9^4+x)81^x-(+1/3)=0
We get rid of parentheses
(9^4+x)81^x-1/3=0
We multiply all the terms by the denominator
((9^4+x)81^x)*3-1=0
We move all terms containing x to the left, all other terms to the right
((9^4+x)81^x)*3=1
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