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63=7(1+b)
We move all terms to the left:
63-(7(1+b))=0
We add all the numbers together, and all the variables
-(7(b+1))+63=0
We calculate terms in parentheses: -(7(b+1)), so:We get rid of parentheses
7(b+1)
We multiply parentheses
7b+7
Back to the equation:
-(7b+7)
-7b-7+63=0
We add all the numbers together, and all the variables
-7b+56=0
We move all terms containing b to the left, all other terms to the right
-7b=-56
b=-56/-7
b=+8
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