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w=4w-150
We move all terms to the left:
w-(4w-150)=0
We get rid of parentheses
w-4w+150=0
We add all the numbers together, and all the variables
-3w+150=0
We move all terms containing w to the left, all other terms to the right
-3w=-150
w=-150/-3
w=+50
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