f(x) = 4x / 2x-3,x # 3/2, nilai f-1(4) Tolong di bantu yaaa

y = 4x / 2x-3
y(2x-3)=4x
2xy-3y=4x
2xy-4x=3y
x(2y-4)=3y
x=3y / 2y-4
f-¹(x)= 3x / 2x-4
f-¹(4)=3(4) / 2(4)-4
=12 / 8-4
=12/4
=3
solved