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6=w+3.5
We move all terms to the left:
6-(w+3.5)=0
We get rid of parentheses
-w-3.5+6=0
We add all the numbers together, and all the variables
-1w+2.5=0
We move all terms containing w to the left, all other terms to the right
-w=-2.5
w=-2.5/-1
w=2+0.5/1
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