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4(10)^0.2x/5=3
We move all terms to the left:
4(10)^0.2x/5-(3)=0
We multiply all the terms by the denominator
410^0.2x-3*5=0
We add all the numbers together, and all the variables
410^0.2x-15=0
We move all terms containing x to the left, all other terms to the right
410^0.2x=15
x=15/1
x=15
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