-172=-4(-8b+7)-8b

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Solution for -172=-4(-8b+7)-8b equation: 



-172=-4(-8b+7)-8b

We move all terms to the left:

-172-(-4(-8b+7)-8b)=0



We calculate terms in parentheses: -(-4(-8b+7)-8b), so:

-4(-8b+7)-8b

We add all the numbers together, and all the variables

-8b-4(-8b+7)

We multiply parentheses

-8b+32b-28

We add all the numbers together, and all the variables

24b-28

Back to the equation:

-(24b-28)



We get rid of parentheses

-24b+28-172=0

We add all the numbers together, and all the variables

-24b-144=0

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

-24b=144

b=144/-24

b=-6

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