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7=7(w-4)
We move all terms to the left:
7-(7(w-4))=0
We calculate terms in parentheses: -(7(w-4)), so:We get rid of parentheses
7(w-4)
We multiply parentheses
7w-28
Back to the equation:
-(7w-28)
-7w+28+7=0
We add all the numbers together, and all the variables
-7w+35=0
We move all terms containing w to the left, all other terms to the right
-7w=-35
w=-35/-7
w=+5
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