What is the inverse of the function below?

f (x) = 2x + 12
_________
5

Question

What is the inverse of the function below? 

f (x) = 	2x  +  12
                 _________
                      5

donnie1999 · Answer

@dcskaf

anonymous · Answer

x= 2y+12
      -----
         5
multiply 5 then subtract and finally divide

donnie1999 · Answer

i got f-^1(X)= 14/5 x ???

anonymous · Answer

Ok lets go through it together
x= 2y+12
      -----
         5
multiply 5 you get 5x=2y+12

anonymous · Answer

ok so far?

donnie1999 · Answer

ya

anonymous · Answer

then you subtract 12 to get 5x-12 =2y

donnie1999 · Answer

so would it be f-^1(x)= -2x+12
                                     ------         ????
                                         5

anonymous · Answer

not quite it should be y= 5x-12
                                        -----
                                            2
which simplifies to either 2.5x-6 or 5/2x-6

anonymous · Answer

do you get it?

donnie1999 · Answer

idk would it be f-^1(x)= 5/2x - 6 then???

anonymous · Answer

yes