-220=4(1-8b)

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Solution for -220=4(1-8b) equation: 



-220=4(1-8b)

We move all terms to the left:

-220-(4(1-8b))=0

We add all the numbers together, and all the variables

-(4(-8b+1))-220=0



We calculate terms in parentheses: -(4(-8b+1)), so:

4(-8b+1)

We multiply parentheses

-32b+4

Back to the equation:

-(-32b+4)



We get rid of parentheses

32b-4-220=0

We add all the numbers together, and all the variables

32b-224=0

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

32b=224

b=224/32

b=7

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