3n+12-15=51

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Solution for 3n+12-15=51 equation: 



3n+12-15=51

We move all terms to the left:

3n+12-15-(51)=0

We add all the numbers together, and all the variables

3n-54=0

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

3n=54

n=54/3

n=18

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