If \hspace{0.1cm}f(x) = (2x+3),\hspace{0.1cm} then \hspace{0.1cm}f^{-1}(x) = ?

  1. x+3
  2. \frac12(x-3)
  3. \frac23(x+3)
  4. \frac23(x-3)

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