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-8b+40=-8(8b+2)
We move all terms to the left:
-8b+40-(-8(8b+2))=0
We calculate terms in parentheses: -(-8(8b+2)), so:We get rid of parentheses
-8(8b+2)
We multiply parentheses
-64b-16
Back to the equation:
-(-64b-16)
-8b+64b+16+40=0
We add all the numbers together, and all the variables
56b+56=0
We move all terms containing b to the left, all other terms to the right
56b=-56
b=-56/56
b=-1
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