-47=5(-9-4b)=20b

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Solution for -47=5(-9-4b)=20b equation: 



-47=5(-9-4b)=20b

We move all terms to the left:

-47-(5(-9-4b))=0

We add all the numbers together, and all the variables

-(5(-4b-9))-47=0



We calculate terms in parentheses: -(5(-4b-9)), so:

5(-4b-9)

We multiply parentheses

-20b-45

Back to the equation:

-(-20b-45)



We get rid of parentheses

20b+45-47=0

We add all the numbers together, and all the variables

20b-2=0

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

20b=2

b=2/20

b=1/10

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