31-12n=21

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Solution for 31-12n=21 equation: 



31-12n=21

We move all terms to the left:

31-12n-(21)=0

We add all the numbers together, and all the variables

-12n+10=0

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

-12n=-10

n=-10/-12

n=5/6

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