8b-40=-4(1-5b)

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Solution for 8b-40=-4(1-5b) equation: 



8b-40=-4(1-5b)

We move all terms to the left:

8b-40-(-4(1-5b))=0

We add all the numbers together, and all the variables

8b-(-4(-5b+1))-40=0



We calculate terms in parentheses: -(-4(-5b+1)), so:

-4(-5b+1)

We multiply parentheses

20b-4

Back to the equation:

-(20b-4)



We get rid of parentheses

8b-20b+4-40=0

We add all the numbers together, and all the variables

-12b-36=0

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

-12b=36

b=36/-12

b=-3

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