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y = 2- 5x / 3x + 1
3xy + y = 2 - 5x
3xy + 5x = 2 - y
x (3y + 5) = 2 - y
x = 2 - y / 3y + 5
f-¹ (x) = 2 - x / 3x + 5
3x + 5 ≠ 0
3x ≠ -5
x ≠ -5/3
jadi jawabannya 2 - x / 3x + 5, x ≠ -5/3 (C)
maaf kalau salah..