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-3+-7=-3w+7+-7
We move all terms to the left:
-3+-7-(-3w+7+-7)=0
We add all the numbers together, and all the variables
-(-3w)-3-7+=0
We add all the numbers together, and all the variables
-(-3w)=0
We get rid of parentheses
3w=0
w=0/3
w=0
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