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82=4b-3(-4-2b)
We move all terms to the left:
82-(4b-3(-4-2b))=0
We add all the numbers together, and all the variables
-(4b-3(-2b-4))+82=0
We calculate terms in parentheses: -(4b-3(-2b-4)), so:We get rid of parentheses
4b-3(-2b-4)
We multiply parentheses
4b+6b+12
We add all the numbers together, and all the variables
10b+12
Back to the equation:
-(10b+12)
-10b-12+82=0
We add all the numbers together, and all the variables
-10b+70=0
We move all terms containing b to the left, all other terms to the right
-10b=-70
b=-70/-10
b=+7
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