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