30-2n=12

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Solution for 30-2n=12 equation: 



30-2n=12

We move all terms to the left:

30-2n-(12)=0

We add all the numbers together, and all the variables

-2n+18=0

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

-2n=-18

n=-18/-2

n=+9

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