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2w+18=-w-12
We move all terms to the left:
2w+18-(-w-12)=0
We add all the numbers together, and all the variables
2w-(-1w-12)+18=0
We get rid of parentheses
2w+1w+12+18=0
We add all the numbers together, and all the variables
3w+30=0
We move all terms containing w to the left, all other terms to the right
3w=-30
w=-30/3
w=-10
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