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-9a+(-1)=26
We move all terms to the left:
-9a+(-1)-(26)=0
determiningTheFunctionDomain -9a-26+(-1)=0
We add all the numbers together, and all the variables
-9a-27=0
We move all terms containing a to the left, all other terms to the right
-9a=27
a=27/-9
a=-3
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