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220=2w+2(5w-4)
We move all terms to the left:
220-(2w+2(5w-4))=0
We calculate terms in parentheses: -(2w+2(5w-4)), so:We get rid of parentheses
2w+2(5w-4)
We multiply parentheses
2w+10w-8
We add all the numbers together, and all the variables
12w-8
Back to the equation:
-(12w-8)
-12w+8+220=0
We add all the numbers together, and all the variables
-12w+228=0
We move all terms containing w to the left, all other terms to the right
-12w=-228
w=-228/-12
w=+19
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