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17=20+3w
We move all terms to the left:
17-(20+3w)=0
We add all the numbers together, and all the variables
-(3w+20)+17=0
We get rid of parentheses
-3w-20+17=0
We add all the numbers together, and all the variables
-3w-3=0
We move all terms containing w to the left, all other terms to the right
-3w=3
w=3/-3
w=-1
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