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d-42/4=9
We move all terms to the left:
d-42/4-(9)=0
determiningTheFunctionDomain d-9-42/4=0
We multiply all the terms by the denominator
d*4-42-9*4=0
We add all the numbers together, and all the variables
d*4-78=0
Wy multiply elements
4d-78=0
We move all terms containing d to the left, all other terms to the right
4d=78
d=78/4
d=19+1/2
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