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(3^2x)-(3^x+4)=810
We move all terms to the left:
(3^2x)-(3^x+4)-(810)=0
We get rid of parentheses
3^2x-3^x-4-810=0
We add all the numbers together, and all the variables
3^2x-3^x-814=0
We move all terms containing x to the left, all other terms to the right
3^2x-3^x=814
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