3n+9=78

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Solution for 3n+9=78 equation: 



3n+9=78

We move all terms to the left:

3n+9-(78)=0

We add all the numbers together, and all the variables

3n-69=0

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

3n=69

n=69/3

n=23

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