3+n+15+9=69

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Solution for 3+n+15+9=69 equation: 



3+n+15+9=69

We move all terms to the left:

3+n+15+9-(69)=0

We add all the numbers together, and all the variables

n-42=0

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

n=42

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