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2=18^4f-2
We move all terms to the left:
2-(18^4f-2)=0
We get rid of parentheses
-18^4f+2+2=0
We add all the numbers together, and all the variables
-18^4f+4=0
We move all terms containing f to the left, all other terms to the right
-18^4f=-4
f=-4/1
f=-4
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