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b-27=(27-b)
We move all terms to the left:
b-27-((27-b))=0
We add all the numbers together, and all the variables
b-((-1b+27))-27=0
We calculate terms in parentheses: -((-1b+27)), so:We get rid of parentheses
(-1b+27)
We get rid of parentheses
-1b+27
Back to the equation:
-(-1b+27)
b+1b-27-27=0
We add all the numbers together, and all the variables
2b-54=0
We move all terms containing b to the left, all other terms to the right
2b=54
b=54/2
b=27
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