3n-9=54

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Solution for 3n-9=54 equation: 



3n-9=54

We move all terms to the left:

3n-9-(54)=0

We add all the numbers together, and all the variables

3n-63=0

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

3n=63

n=63/3

n=21

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