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-3=-10+w/3
We move all terms to the left:
-3-(-10+w/3)=0
We add all the numbers together, and all the variables
-(w/3-10)-3=0
We get rid of parentheses
-w/3+10-3=0
We multiply all the terms by the denominator
-w+10*3-3*3=0
We add all the numbers together, and all the variables
-1w+21=0
We move all terms containing w to the left, all other terms to the right
-w=-21
w=-21/-1
w=+21
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