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(2*4)^x-1=100
We move all terms to the left:
(2*4)^x-1-(100)=0
We add all the numbers together, and all the variables
8^x-1-100=0
We add all the numbers together, and all the variables
8^x-101=0
We move all terms containing x to the left, all other terms to the right
8^x=101
x=101/1
x=101
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