N+18=7n-21

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Solution for N+18=7n-21 equation: 



+18=7N-21

We move all terms to the left:

+18-(7N-21)=0

We get rid of parentheses

-7N+21+18=0

We add all the numbers together, and all the variables

-7N+39=0

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

-7N=-39

N=-39/-7

N=5+4/7

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