-140=-4n-8(7+3n)

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Solution for -140=-4n-8(7+3n) equation: 



-140=-4n-8(7+3n)

We move all terms to the left:

-140-(-4n-8(7+3n))=0

We add all the numbers together, and all the variables

-(-4n-8(3n+7))-140=0



We calculate terms in parentheses: -(-4n-8(3n+7)), so:

-4n-8(3n+7)

We multiply parentheses

-4n-24n-56

We add all the numbers together, and all the variables

-28n-56

Back to the equation:

-(-28n-56)



We get rid of parentheses

28n+56-140=0

We add all the numbers together, and all the variables

28n-84=0

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

28n=84

n=84/28

n=3

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