-117=-3(-3-6b)+3b

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Solution for -117=-3(-3-6b)+3b equation: 



-117=-3(-3-6b)+3b

We move all terms to the left:

-117-(-3(-3-6b)+3b)=0

We add all the numbers together, and all the variables

-(-3(-6b-3)+3b)-117=0



We calculate terms in parentheses: -(-3(-6b-3)+3b), so:

-3(-6b-3)+3b

We add all the numbers together, and all the variables

3b-3(-6b-3)

We multiply parentheses

3b+18b+9

We add all the numbers together, and all the variables

21b+9

Back to the equation:

-(21b+9)



We get rid of parentheses

-21b-9-117=0

We add all the numbers together, and all the variables

-21b-126=0

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

-21b=126

b=126/-21

b=-6

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