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-4w+2(w+2)=12
We move all terms to the left:
-4w+2(w+2)-(12)=0
We multiply parentheses
-4w+2w+4-12=0
We add all the numbers together, and all the variables
-2w-8=0
We move all terms containing w to the left, all other terms to the right
-2w=8
w=8/-2
w=-4
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