3n-7n=12-8n

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Solution for 3n-7n=12-8n equation: 



3n-7n=12-8n

We move all terms to the left:

3n-7n-(12-8n)=0

We add all the numbers together, and all the variables

3n-7n-(-8n+12)=0

We add all the numbers together, and all the variables

-4n-(-8n+12)=0

We get rid of parentheses

-4n+8n-12=0

We add all the numbers together, and all the variables

4n-12=0

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

4n=12

n=12/4

n=3

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