-40-4b=-4(-2+7b)

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Solution for -40-4b=-4(-2+7b) equation: 



-40-4b=-4(-2+7b)

We move all terms to the left:

-40-4b-(-4(-2+7b))=0

We add all the numbers together, and all the variables

-4b-(-4(7b-2))-40=0



We calculate terms in parentheses: -(-4(7b-2)), so:

-4(7b-2)

We multiply parentheses

-28b+8

Back to the equation:

-(-28b+8)



We get rid of parentheses

-4b+28b-8-40=0

We add all the numbers together, and all the variables

24b-48=0

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

24b=48

b=48/24

b=2

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