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0.39w+4.5=8.4
We move all terms to the left:
0.39w+4.5-(8.4)=0
We add all the numbers together, and all the variables
0.39w-3.9=0
We move all terms containing w to the left, all other terms to the right
0.39w=3.9
w=3.9/0.39
w=10+-4.4408920985E-16/0.39
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