80=-8(5+b)

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Solution for 80=-8(5+b) equation: 



80=-8(5+b)

We move all terms to the left:

80-(-8(5+b))=0

We add all the numbers together, and all the variables

-(-8(b+5))+80=0



We calculate terms in parentheses: -(-8(b+5)), so:

-8(b+5)

We multiply parentheses

-8b-40

Back to the equation:

-(-8b-40)



We get rid of parentheses

8b+40+80=0

We add all the numbers together, and all the variables

8b+120=0

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

8b=-120

b=-120/8

b=-15

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