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-7+7w=5w+7
We move all terms to the left:
-7+7w-(5w+7)=0
We get rid of parentheses
7w-5w-7-7=0
We add all the numbers together, and all the variables
2w-14=0
We move all terms containing w to the left, all other terms to the right
2w=14
w=14/2
w=7
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