If y= f(x) = ax + b/x-a then prove that x = f(y)

#math
If y=f(x)=ax+b/x-a then prove that x = f(y)

if y=f(x)=ax-b/cx-a show that x=f(y)

if y=f(x)=ax-b/cx-a then x is equal to

find the domain and range (of) f(x)=(ax+b)/(bx-a)

if f(x)=(ax-b)/(cx-a)=y then f(y) equals -