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3=-12+5w
We move all terms to the left:
3-(-12+5w)=0
We add all the numbers together, and all the variables
-(5w-12)+3=0
We get rid of parentheses
-5w+12+3=0
We add all the numbers together, and all the variables
-5w+15=0
We move all terms containing w to the left, all other terms to the right
-5w=-15
w=-15/-5
w=+3
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