-21=-8(9n+7)

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



-21=-8(9n+7)

We move all terms to the left:

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



We calculate terms in parentheses: -(-8(9n+7)), so:

-8(9n+7)

We multiply parentheses

-72n-56

Back to the equation:

-(-72n-56)



We get rid of parentheses

72n+56-21=0

We add all the numbers together, and all the variables

72n+35=0

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

72n=-35

n=-35/72

n=-35/72

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