7n-21=64

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Solution for 7n-21=64 equation: 



7n-21=64

We move all terms to the left:

7n-21-(64)=0

We add all the numbers together, and all the variables

7n-85=0

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

7n=85

n=85/7

n=12+1/7

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