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-1/5d=13
We move all terms to the left:
-1/5d-(13)=0
Domain of the equation: 5d!=0We multiply all the terms by the denominator
d!=0/5
d!=0
d∈R
-13*5d-1=0
Wy multiply elements
-65d-1=0
We move all terms containing d to the left, all other terms to the right
-65d=1
d=1/-65
d=-1/65
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