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-2w-25=-9(w-5)
We move all terms to the left:
-2w-25-(-9(w-5))=0
We calculate terms in parentheses: -(-9(w-5)), so:We get rid of parentheses
-9(w-5)
We multiply parentheses
-9w+45
Back to the equation:
-(-9w+45)
-2w+9w-45-25=0
We add all the numbers together, and all the variables
7w-70=0
We move all terms containing w to the left, all other terms to the right
7w=70
w=70/7
w=10
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