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2/5w=400
We move all terms to the left:
2/5w-(400)=0
Domain of the equation: 5w!=0We multiply all the terms by the denominator
w!=0/5
w!=0
w∈R
-400*5w+2=0
Wy multiply elements
-2000w+2=0
We move all terms containing w to the left, all other terms to the right
-2000w=-2
w=-2/-2000
w=1/1000
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