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20-2(2w+1)=12w-2(12+1)
We move all terms to the left:
20-2(2w+1)-(12w-2(12+1))=0
We add all the numbers together, and all the variables
-2(2w+1)-(12w-213)+20=0
We multiply parentheses
-4w-(12w-213)-2+20=0
We get rid of parentheses
-4w-12w+213-2+20=0
We add all the numbers together, and all the variables
-16w+231=0
We move all terms containing w to the left, all other terms to the right
-16w=-231
w=-231/-16
w=14+7/16
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