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287=19-w
We move all terms to the left:
287-(19-w)=0
We add all the numbers together, and all the variables
-(-1w+19)+287=0
We get rid of parentheses
1w-19+287=0
We add all the numbers together, and all the variables
w+268=0
We move all terms containing w to the left, all other terms to the right
w=-268
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