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4^x-5=16^2x-31
We move all terms to the left:
4^x-5-(16^2x-31)=0
We get rid of parentheses
4^x-16^2x+31-5=0
We add all the numbers together, and all the variables
4^x-16^2x+26=0
We move all terms containing x to the left, all other terms to the right
4^x-16^2x=-26
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