The solution set of the equation \( \log (x+6)- \) \( \log 8=\log 9-\log (x+7) \) is (a) \( \{-1...

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The solution set of the equation \( \log (x+6)- \) \( \log 8=\log 9-\log (x+7) \) is
(a) \( \{-15,2\} \)
(b) \( \{2\} \)
(c) \( \{-15,0,2\} \)
(d) \( \{0,2\} \)
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