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-4/d=-2
We move all terms to the left:
-4/d-(-2)=0
Domain of the equation: d!=0We add all the numbers together, and all the variables
d∈R
-4/d+2=0
We multiply all the terms by the denominator
2*d-4=0
We add all the numbers together, and all the variables
2d-4=0
We move all terms containing d to the left, all other terms to the right
2d=4
d=4/2
d=2
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