80=-4(5+5n)

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Solution for 80=-4(5+5n) equation: 



80=-4(5+5n)

We move all terms to the left:

80-(-4(5+5n))=0

We add all the numbers together, and all the variables

-(-4(5n+5))+80=0



We calculate terms in parentheses: -(-4(5n+5)), so:

-4(5n+5)

We multiply parentheses

-20n-20

Back to the equation:

-(-20n-20)



We get rid of parentheses

20n+20+80=0

We add all the numbers together, and all the variables

20n+100=0

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

20n=-100

n=-100/20

n=-5

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