420=-6(7n-7)

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Solution for 420=-6(7n-7) equation: 



420=-6(7n-7)

We move all terms to the left:

420-(-6(7n-7))=0



We calculate terms in parentheses: -(-6(7n-7)), so:

-6(7n-7)

We multiply parentheses

-42n+42

Back to the equation:

-(-42n+42)



We get rid of parentheses

42n-42+420=0

We add all the numbers together, and all the variables

42n+378=0

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

42n=-378

n=-378/42

n=-9

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