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0.2^(4x)=0.0016
We move all terms to the left:
0.2^(4x)-(0.0016)=0
We add all the numbers together, and all the variables
0.2^4x-0.0016=0
We move all terms containing x to the left, all other terms to the right
0.2^4x=0.0016
x=0.0016/1
x=0.0016
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