181=b-(-90)

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Solution for 181=b-(-90) equation: 



181=b-(-90)

We move all terms to the left:

181-(b-(-90))=0



We calculate terms in parentheses: -(b-(-90)), so:

b-(-90)

We add all the numbers together, and all the variables

b+90

Back to the equation:

-(b+90)



We get rid of parentheses

-b-90+181=0

We add all the numbers together, and all the variables

-1b+91=0

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

-b=-91

b=-91/-1

b=+91

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