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220=2(2w+30)
We move all terms to the left:
220-(2(2w+30))=0
We calculate terms in parentheses: -(2(2w+30)), so:We get rid of parentheses
2(2w+30)
We multiply parentheses
4w+60
Back to the equation:
-(4w+60)
-4w-60+220=0
We add all the numbers together, and all the variables
-4w+160=0
We move all terms containing w to the left, all other terms to the right
-4w=-160
w=-160/-4
w=+40
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