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2/5d=40
We move all terms to the left:
2/5d-(40)=0
Domain of the equation: 5d!=0We multiply all the terms by the denominator
d!=0/5
d!=0
d∈R
-40*5d+2=0
Wy multiply elements
-200d+2=0
We move all terms containing d to the left, all other terms to the right
-200d=-2
d=-2/-200
d=1/100
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