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70=7(b+1)
We move all terms to the left:
70-(7(b+1))=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+70=0
We add all the numbers together, and all the variables
-7b+63=0
We move all terms containing b to the left, all other terms to the right
-7b=-63
b=-63/-7
b=+9
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