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256=90-w
We move all terms to the left:
256-(90-w)=0
We add all the numbers together, and all the variables
-(-1w+90)+256=0
We get rid of parentheses
1w-90+256=0
We add all the numbers together, and all the variables
w+166=0
We move all terms containing w to the left, all other terms to the right
w=-166
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