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40/d=-5
We move all terms to the left:
40/d-(-5)=0
Domain of the equation: d!=0We add all the numbers together, and all the variables
d∈R
40/d+5=0
We multiply all the terms by the denominator
5*d+40=0
We add all the numbers together, and all the variables
5d+40=0
We move all terms containing d to the left, all other terms to the right
5d=-40
d=-40/5
d=-8
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