12=0,3n

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Solution for 12=0,3n equation: 



12=0.3n

We move all terms to the left:

12-(0.3n)=0

We add all the numbers together, and all the variables

-(+0.3n)+12=0

We get rid of parentheses

-0.3n+12=0

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

-0.3n=-12

n=-12/-0.3

n=+40

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