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2^(7-3x)=(1)/(4)
We move all terms to the left:
2^(7-3x)-((1)/(4))=0
We add all the numbers together, and all the variables
2^(-3x+7)-(+1/4)=0
We get rid of parentheses
2^(-3x+7)-1/4=0
We multiply all the terms by the denominator
(2^(-3x+7))*4-1=0
We move all terms containing x to the left, all other terms to the right
(2^(-3x+7))*4=1
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