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9^3x+12=81^6
We move all terms to the left:
9^3x+12-(81^6)=0
We add all the numbers together, and all the variables
9^3x-282429536469=0
We move all terms containing x to the left, all other terms to the right
9^3x=282429536469
x=282429536469/1
x=282429536469
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