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49=7(b-82)
We move all terms to the left:
49-(7(b-82))=0
We calculate terms in parentheses: -(7(b-82)), so:We get rid of parentheses
7(b-82)
We multiply parentheses
7b-574
Back to the equation:
-(7b-574)
-7b+574+49=0
We add all the numbers together, and all the variables
-7b+623=0
We move all terms containing b to the left, all other terms to the right
-7b=-623
b=-623/-7
b=+89
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