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-3=8w-7w-9
We move all terms to the left:
-3-(8w-7w-9)=0
We add all the numbers together, and all the variables
-(w-9)-3=0
We get rid of parentheses
-w+9-3=0
We add all the numbers together, and all the variables
-1w+6=0
We move all terms containing w to the left, all other terms to the right
-w=-6
w=-6/-1
w=+6
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