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-3(w-7)+3=w-4
We move all terms to the left:
-3(w-7)+3-(w-4)=0
We multiply parentheses
-3w-(w-4)+21+3=0
We get rid of parentheses
-3w-w+4+21+3=0
We add all the numbers together, and all the variables
-4w+28=0
We move all terms containing w to the left, all other terms to the right
-4w=-28
w=-28/-4
w=+7
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