-40=-10(b-89)

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Solution for -40=-10(b-89) equation: 



-40=-10(b-89)

We move all terms to the left:

-40-(-10(b-89))=0



We calculate terms in parentheses: -(-10(b-89)), so:

-10(b-89)

We multiply parentheses

-10b+890

Back to the equation:

-(-10b+890)



We get rid of parentheses

10b-890-40=0

We add all the numbers together, and all the variables

10b-930=0

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

10b=930

b=930/10

b=93

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