-12=42-6n

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Solution for -12=42-6n equation: 



-12=42-6n

We move all terms to the left:

-12-(42-6n)=0

We add all the numbers together, and all the variables

-(-6n+42)-12=0

We get rid of parentheses

6n-42-12=0

We add all the numbers together, and all the variables

6n-54=0

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

6n=54

n=54/6

n=9

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