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5.13(10)^(2.3x)=400
We move all terms to the left:
5.13(10)^(2.3x)-(400)=0
We add all the numbers together, and all the variables
5.1310^(+2.3x)-400=0
We move all terms containing x to the left, all other terms to the right
5.1310^(+2.3x)=400
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