-18=-(b-(-9))

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



-18=-(b-(-9))

We move all terms to the left:

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



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

-(b-(-9))



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

b-(-9)

We add all the numbers together, and all the variables

b+9

Back to the equation:

-(b+9)



We get rid of parentheses

-b-9

We add all the numbers together, and all the variables

-1b-9

Back to the equation:

-(-1b-9)



We get rid of parentheses

1b+9-18=0

We add all the numbers together, and all the variables

b-9=0

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

b=9

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