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(x+11)(9)=(12)(x)
We move all terms to the left:
(x+11)(9)-((12)(x))=0
determiningTheFunctionDomain (x+11)9-12x=0
We add all the numbers together, and all the variables
-12x+(x+11)9=0
We multiply parentheses
-12x+9x+99=0
We add all the numbers together, and all the variables
-3x+99=0
We move all terms containing x to the left, all other terms to the right
-3x=-99
x=-99/-3
x=+33
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