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249=-w+40
We move all terms to the left:
249-(-w+40)=0
We add all the numbers together, and all the variables
-(-1w+40)+249=0
We get rid of parentheses
1w-40+249=0
We add all the numbers together, and all the variables
w+209=0
We move all terms containing w to the left, all other terms to the right
w=-209
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