-7-7n=21

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Solution for -7-7n=21 equation: 



-7-7n=21

We move all terms to the left:

-7-7n-(21)=0

We add all the numbers together, and all the variables

-7n-28=0

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

-7n=28

n=28/-7

n=-4

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