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240=283-w
We move all terms to the left:
240-(283-w)=0
We add all the numbers together, and all the variables
-(-1w+283)+240=0
We get rid of parentheses
1w-283+240=0
We add all the numbers together, and all the variables
w-43=0
We move all terms containing w to the left, all other terms to the right
w=43
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