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0.8w-0.5w+0.3w=-3
We move all terms to the left:
0.8w-0.5w+0.3w-(-3)=0
We add all the numbers together, and all the variables
0.6w+3=0
We move all terms containing w to the left, all other terms to the right
0.6w=-3
w=-3/0.6
w=-5
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