7=9-3n

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Solution for 7=9-3n equation: 



7=9-3n

We move all terms to the left:

7-(9-3n)=0

We add all the numbers together, and all the variables

-(-3n+9)+7=0

We get rid of parentheses

3n-9+7=0

We add all the numbers together, and all the variables

3n-2=0

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

3n=2

n=2/3

n=2/3

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