-n+21=12n-15

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Solution for -n+21=12n-15 equation: 



-n+21=12n-15

We move all terms to the left:

-n+21-(12n-15)=0

We add all the numbers together, and all the variables

-1n-(12n-15)+21=0

We get rid of parentheses

-1n-12n+15+21=0

We add all the numbers together, and all the variables

-13n+36=0

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

-13n=-36

n=-36/-13

n=2+10/13

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