3(n-9)=21

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



3(n-9)=21

We move all terms to the left:

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

We multiply parentheses

3n-27-21=0

We add all the numbers together, and all the variables

3n-48=0

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

3n=48

n=48/3

n=16

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