3n-5=n+7

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Solution for 3n-5=n+7 equation: 



3n-5=n+7

We move all terms to the left:

3n-5-(n+7)=0

We get rid of parentheses

3n-n-7-5=0

We add all the numbers together, and all the variables

2n-12=0

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

2n=12

n=12/2

n=6

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