-78=-2(3+6n)

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Solution for -78=-2(3+6n) equation: 



-78=-2(3+6n)

We move all terms to the left:

-78-(-2(3+6n))=0

We add all the numbers together, and all the variables

-(-2(6n+3))-78=0



We calculate terms in parentheses: -(-2(6n+3)), so:

-2(6n+3)

We multiply parentheses

-12n-6

Back to the equation:

-(-12n-6)



We get rid of parentheses

12n+6-78=0

We add all the numbers together, and all the variables

12n-72=0

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

12n=72

n=72/12

n=6

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