- #1

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When I first worked this problem I found the answer to be:

[tex]\frac{1}{2x-6}[/tex]

However, in my English class we had this Vietnamese substitute who took my worksheet and did the problems on it in his head and pointed at the answer I wrote for this problem and walked away. He came back and worked it out in front of me and he got the answer:

[tex]\frac{1}{2x+6}[/tex]

Which answer is correct?