2^x-1=21

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Solution for 2^x-1=21 equation: 



2^x-1=21

We move all terms to the left:

2^x-1-(21)=0

We add all the numbers together, and all the variables

2^x-22=0

We move all terms containing x to the left, all other terms to the right

2^x=22

x=22/1

x=22

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