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-3.1+3w=-7.9
We move all terms to the left:
-3.1+3w-(-7.9)=0
We add all the numbers together, and all the variables
3w+4.8=0
We move all terms containing w to the left, all other terms to the right
3w=-4.8
w=-4.8/3
w=-1+1/1.6666666666667
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