42=-2(9+7n)-6n

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Solution for 42=-2(9+7n)-6n equation: 



42=-2(9+7n)-6n

We move all terms to the left:

42-(-2(9+7n)-6n)=0

We add all the numbers together, and all the variables

-(-2(7n+9)-6n)+42=0



We calculate terms in parentheses: -(-2(7n+9)-6n), so:

-2(7n+9)-6n

We add all the numbers together, and all the variables

-6n-2(7n+9)

We multiply parentheses

-6n-14n-18

We add all the numbers together, and all the variables

-20n-18

Back to the equation:

-(-20n-18)



We get rid of parentheses

20n+18+42=0

We add all the numbers together, and all the variables

20n+60=0

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

20n=-60

n=-60/20

n=-3

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