2n-12=30

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Solution for 2n-12=30 equation: 



2n-12=30

We move all terms to the left:

2n-12-(30)=0

We add all the numbers together, and all the variables

2n-42=0

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

2n=42

n=42/2

n=21

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