-80=-10(-2b)

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Solution for -80=-10(-2b) equation: 



-80=-10(-2b)

We move all terms to the left:

-80-(-10(-2b))=0



We calculate terms in parentheses: -(-10(-2b)), so:

-10(-2b)

We multiply parentheses

20b

Back to the equation:

-(20b)



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

-20b=80

b=80/-20

b=-4

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