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8w+9=4w+12
We move all terms to the left:
8w+9-(4w+12)=0
We get rid of parentheses
8w-4w-12+9=0
We add all the numbers together, and all the variables
4w-3=0
We move all terms containing w to the left, all other terms to the right
4w=3
w=3/4
w=3/4
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