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-2w-1=-10w-20
We move all terms to the left:
-2w-1-(-10w-20)=0
We get rid of parentheses
-2w+10w+20-1=0
We add all the numbers together, and all the variables
8w+19=0
We move all terms containing w to the left, all other terms to the right
8w=-19
w=-19/8
w=-2+3/8
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