-204=4(5+7b)

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Solution for -204=4(5+7b) equation: 



-204=4(5+7b)

We move all terms to the left:

-204-(4(5+7b))=0

We add all the numbers together, and all the variables

-(4(7b+5))-204=0



We calculate terms in parentheses: -(4(7b+5)), so:

4(7b+5)

We multiply parentheses

28b+20

Back to the equation:

-(28b+20)



We get rid of parentheses

-28b-20-204=0

We add all the numbers together, and all the variables

-28b-224=0

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

-28b=224

b=224/-28

b=-8

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