N=a-7

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Solution for N=a-7 equation: 



=N-7

We move all terms to the left:

-(N-7)=0

We get rid of parentheses

-N+7=0

We add all the numbers together, and all the variables

-1N+7=0

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

-N=-7

N=-7/-1

N=+7

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