-21=-9-8n+7)+7(6n-2)

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Solution for -21=-9-8n+7)+7(6n-2) equation: 



-21=-9-8n+7)+7(6n-2)

We move all terms to the left:

-21-(-9-8n+7)+7(6n-2))=0

We add all the numbers together, and all the variables

-(-8n-2)+7(6n-2))-21=0

We get rid of parentheses

8n+7(6n-2))-21+2=0

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