2^1n+12=21

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Solution for 2^1n+12=21 equation: 



2^1n+12=21

We move all terms to the left:

2^1n+12-(21)=0

We add all the numbers together, and all the variables

2^1n-9=0

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

2^1n=9

n=9/1

n=9

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