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3^(4x-9)=1/243
We move all terms to the left:
3^(4x-9)-(1/243)=0
We add all the numbers together, and all the variables
3^(4x-9)-(+1/243)=0
We get rid of parentheses
3^(4x-9)-1/243=0
We multiply all the terms by the denominator
(3^(4x-9))*243-1=0
We move all terms containing x to the left, all other terms to the right
(3^(4x-9))*243=1
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