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saya rasa jawabannya tidak salah
semoga membantu
y = (7x + 8)/(3x - 5)
3xy - 5y = 7x + 8
3xy - 7x = 5y + 8
x(3y - 7) = 5y + 8
x = (5y + 8)/(3y - 7)
f^-1(x) = (5x + 8)/(3x - 7) ; x ≠ 7/3
Cara cepat
f(x) = (ax + b)/(cx + d) => f^-1(x) = (-dx + b)/(cx - a)
f(x) = (7x + 8)/(3x - 5) => f^-1(x) = (5x + 8)/(3x - 7) ; x ≠ 7/3