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-20=-8+4w
We move all terms to the left:
-20-(-8+4w)=0
We add all the numbers together, and all the variables
-(4w-8)-20=0
We get rid of parentheses
-4w+8-20=0
We add all the numbers together, and all the variables
-4w-12=0
We move all terms containing w to the left, all other terms to the right
-4w=12
w=12/-4
w=-3
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