(n-9)/3=21

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Solution for (n-9)/3=21 equation: 



(n-9)/3=21

We move all terms to the left:

(n-9)/3-(21)=0

We multiply all the terms by the denominator


(n-9)-21*3=0

We add all the numbers together, and all the variables

(n-9)-63=0

We get rid of parentheses

n-9-63=0

We add all the numbers together, and all the variables

n-72=0

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

n=72

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