-280=-8(8b-5)

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Solution for -280=-8(8b-5) equation: 



-280=-8(8b-5)

We move all terms to the left:

-280-(-8(8b-5))=0



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

-8(8b-5)

We multiply parentheses

-64b+40

Back to the equation:

-(-64b+40)



We get rid of parentheses

64b-40-280=0

We add all the numbers together, and all the variables

64b-320=0

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

64b=320

b=320/64

b=5

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