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-19-5b=-(1-4b)
We move all terms to the left:
-19-5b-(-(1-4b))=0
We add all the numbers together, and all the variables
-5b-(-(-4b+1))-19=0
We calculate terms in parentheses: -(-(-4b+1)), so:We get rid of parentheses
-(-4b+1)
We get rid of parentheses
4b-1
Back to the equation:
-(4b-1)
-5b-4b+1-19=0
We add all the numbers together, and all the variables
-9b-18=0
We move all terms containing b to the left, all other terms to the right
-9b=18
b=18/-9
b=-2
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