21=7n+6

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Solution for 21=7n+6 equation: 



21=7n+6

We move all terms to the left:

21-(7n+6)=0

We get rid of parentheses

-7n-6+21=0

We add all the numbers together, and all the variables

-7n+15=0

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

-7n=-15

n=-15/-7

n=2+1/7

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