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3.5w-2.7=6
We move all terms to the left:
3.5w-2.7-(6)=0
We add all the numbers together, and all the variables
3.5w-8.7=0
We move all terms containing w to the left, all other terms to the right
3.5w=8.7
w=8.7/3.5
w=2+1/2.0588235294118
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