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-x-2(-8)=9
We move all terms to the left:
-x-2(-8)-(9)=0
determiningTheFunctionDomain -x-9-2(-8)=0
We add all the numbers together, and all the variables
-1x+7=0
We move all terms containing x to the left, all other terms to the right
-x=-7
x=-7/-1
x=+7
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