2n+7=6n-21

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Solution for 2n+7=6n-21 equation: 



2n+7=6n-21

We move all terms to the left:

2n+7-(6n-21)=0

We get rid of parentheses

2n-6n+21+7=0

We add all the numbers together, and all the variables

-4n+28=0

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

-4n=-28

n=-28/-4

n=+7

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