-18=-3(9+b)

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Solution for -18=-3(9+b) equation: 



-18=-3(9+b)

We move all terms to the left:

-18-(-3(9+b))=0

We add all the numbers together, and all the variables

-(-3(b+9))-18=0



We calculate terms in parentheses: -(-3(b+9)), so:

-3(b+9)

We multiply parentheses

-3b-27

Back to the equation:

-(-3b-27)



We get rid of parentheses

3b+27-18=0

We add all the numbers together, and all the variables

3b+9=0

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

3b=-9

b=-9/3

b=-3

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