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27.8=w-18.9
We move all terms to the left:
27.8-(w-18.9)=0
We get rid of parentheses
-w+18.9+27.8=0
We add all the numbers together, and all the variables
-1w+46.7=0
We move all terms containing w to the left, all other terms to the right
-w=-46.7
w=-46.7/-1
w=46+0.7/1
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