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844=872-w
We move all terms to the left:
844-(872-w)=0
We add all the numbers together, and all the variables
-(-1w+872)+844=0
We get rid of parentheses
1w-872+844=0
We add all the numbers together, and all the variables
w-28=0
We move all terms containing w to the left, all other terms to the right
w=28
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