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27=-(-13+b)
We move all terms to the left:
27-(-(-13+b))=0
We add all the numbers together, and all the variables
-(-(b-13))+27=0
We calculate terms in parentheses: -(-(b-13)), so:We get rid of parentheses
-(b-13)
We get rid of parentheses
-b+13
We add all the numbers together, and all the variables
-1b+13
Back to the equation:
-(-1b+13)
1b-13+27=0
We add all the numbers together, and all the variables
b+14=0
We move all terms containing b to the left, all other terms to the right
b=-14
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