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0.8w+0.12=1.72
We move all terms to the left:
0.8w+0.12-(1.72)=0
We add all the numbers together, and all the variables
0.8w-1.6=0
We move all terms containing w to the left, all other terms to the right
0.8w=1.6
w=1.6/0.8
w=2
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