nilai x yang memenuhi persamaan a. 7ˣ⁻¹=4 b. 6ˣ⁻¹=5 c. 7²ˣ⁻⁴=5 tolong dipakaikan cara, Makasih

[tex]a. \: {7}^{x - 1} = 4 \\ log_{7}( {7}^{x - 1} ) = log_{7}(4) \\ x - 1 = log_{7}( {2}^{2} ) \\ x - 1 = 2 \times log_{7}(2) \\ x = 2 \times log_{7}(2) + 1 [/tex]



[tex]b. \: {6}^{x - 1} = 5 \\ log_{6}( {6}^{x - 1} ) = log_{6}(5) \\ x - 1 = log_{6}(5) \\ x = log_{6}(5) + 1[/tex]



[tex]c. \: {7}^{2x - 4} = 5 \\ log_{7}( {7}^{2x - 4} ) = log_{7}(5) \\ 2x - 4 = log_{7}(5) \\ 2x = log_{7}(5) + 4 \\ x = \frac{ log_{7}(5) + 4 }{2} [/tex]
Kurang lebih caranya gitu, tp sorry klo salah