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-3+w=-9-w
We move all terms to the left:
-3+w-(-9-w)=0
We add all the numbers together, and all the variables
w-(-1w-9)-3=0
We get rid of parentheses
w+1w+9-3=0
We add all the numbers together, and all the variables
2w+6=0
We move all terms containing w to the left, all other terms to the right
2w=-6
w=-6/2
w=-3
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