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12w-6-11w=9-2
We move all terms to the left:
12w-6-11w-(9-2)=0
We add all the numbers together, and all the variables
12w-11w-6-7=0
We add all the numbers together, and all the variables
w-13=0
We move all terms containing w to the left, all other terms to the right
w=13
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