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7d-(-10)=87
We move all terms to the left:
7d-(-10)-(87)=0
determiningTheFunctionDomain 7d-87-(-10)=0
We add all the numbers together, and all the variables
7d-77=0
We move all terms containing d to the left, all other terms to the right
7d=77
d=77/7
d=11
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