7n-n-5n-n+n=12

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Solution for 7n-n-5n-n+n=12 equation: 



7n-n-5n-n+n=12

We move all terms to the left:

7n-n-5n-n+n-(12)=0

We add all the numbers together, and all the variables

n-12=0

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

n=12

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