tentukan invers Dari f(x) = 4x-3/5x+2 , x tidak boleh -2/5 !

y=4x-3/5+2
4x=y+3/5-10/5
4x=y-7/5
x=y-7/5 / 4
f invers(x)= x-7/5  / 4

f(x)=4x-3/5x+2
y/1=4x-3/5x+2
y(5x+2)=4x-3
5xy+2y=4x-3
5xy-4x=-2y-3
x(5y-4)=-2y-3
x=-2y-3/5y-4
f invers (y)= 5y-4/-2x-3
f invers (x)= 5x-4/-2x-3