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12.56=w-18.8
We move all terms to the left:
12.56-(w-18.8)=0
We get rid of parentheses
-w+18.8+12.56=0
We add all the numbers together, and all the variables
-1w+31.36=0
We move all terms containing w to the left, all other terms to the right
-w=-31.36
w=-31.36/-1
w=31+0.36/1
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