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7=19+7w-8w
We move all terms to the left:
7-(19+7w-8w)=0
We add all the numbers together, and all the variables
-(-1w+19)+7=0
We get rid of parentheses
1w-19+7=0
We add all the numbers together, and all the variables
w-12=0
We move all terms containing w to the left, all other terms to the right
w=12
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