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jawab

f(x) = (4x - 5)/(6x - 7)
y = (4x -5)/(6x - 7)
y(6x -7) =  4x - 5
6 xy - 7y = 4x - 5
6 xy - 4 x = 7y - 5
x(6y -4) = 7y - 5
x = (7y - 5)/(6y - 4)

f^(-1) = (7x - 5)/(6x - 4)