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8-2w+10w=-7w-7
We move all terms to the left:
8-2w+10w-(-7w-7)=0
We add all the numbers together, and all the variables
8w-(-7w-7)+8=0
We get rid of parentheses
8w+7w+7+8=0
We add all the numbers together, and all the variables
15w+15=0
We move all terms containing w to the left, all other terms to the right
15w=-15
w=-15/15
w=-1
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