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217=144-w
We move all terms to the left:
217-(144-w)=0
We add all the numbers together, and all the variables
-(-1w+144)+217=0
We get rid of parentheses
1w-144+217=0
We add all the numbers together, and all the variables
w+73=0
We move all terms containing w to the left, all other terms to the right
w=-73
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