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-4=-(w-4)
We move all terms to the left:
-4-(-(w-4))=0
We calculate terms in parentheses: -(-(w-4)), so:We get rid of parentheses
-(w-4)
We get rid of parentheses
-w+4
We add all the numbers together, and all the variables
-1w+4
Back to the equation:
-(-1w+4)
1w-4-4=0
We add all the numbers together, and all the variables
w-8=0
We move all terms containing w to the left, all other terms to the right
w=8
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