21n=12n-6

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Solution for 21n=12n-6 equation: 



21n=12n-6

We move all terms to the left:

21n-(12n-6)=0

We get rid of parentheses

21n-12n+6=0

We add all the numbers together, and all the variables

9n+6=0

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

9n=-6

n=-6/9

n=-2/3

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