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X+X+6*2=28
We move all terms to the left:
X+X+6*2-(28)=0
determiningTheFunctionDomain X+X-28+6*2=0
We add all the numbers together, and all the variables
2X-16=0
We move all terms containing X to the left, all other terms to the right
2X=16
X=16/2
X=8
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