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-w+4(w+3)+3=-12
We move all terms to the left:
-w+4(w+3)+3-(-12)=0
We add all the numbers together, and all the variables
-1w+4(w+3)+15=0
We multiply parentheses
-1w+4w+12+15=0
We add all the numbers together, and all the variables
3w+27=0
We move all terms containing w to the left, all other terms to the right
3w=-27
w=-27/3
w=-9
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