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25.9-w=-31.8
We move all terms to the left:
25.9-w-(-31.8)=0
We add all the numbers together, and all the variables
-1w+57.7=0
We move all terms containing w to the left, all other terms to the right
-w=-57.7
w=-57.7/-1
w=57+0.7/1
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