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-12=3+w/3
We move all terms to the left:
-12-(3+w/3)=0
We add all the numbers together, and all the variables
-(w/3+3)-12=0
We get rid of parentheses
-w/3-3-12=0
We multiply all the terms by the denominator
-w-3*3-12*3=0
We add all the numbers together, and all the variables
-1w-45=0
We move all terms containing w to the left, all other terms to the right
-w=45
w=45/-1
w=-45
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