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-2w-2.1=8.5
We move all terms to the left:
-2w-2.1-(8.5)=0
We add all the numbers together, and all the variables
-2w-10.6=0
We move all terms containing w to the left, all other terms to the right
-2w=10.6
w=10.6/-2
w=-5+0.6/2
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