Find the inverse of f(x) = 7x+4

  • Google+ icon
  • LinkedIn icon
  • 786 views

To start make the equation equal y.

So y = 7x+4

Then rearrange the equation to make x the subject.

Subtract 4 from both sides: y-4 = 7x

Divide by 7: (y-4)/7 = x

Now write it in terms of x

f(x)^-1 = (x-4)/7

where f(x)^-1 means the inverse of f(x).

Joe S. A Level Computing tutor, GCSE ICT tutor, GCSE Maths tutor, GCS...

About the author

is an online GCSE Maths tutor with MyTutor studying at Bristol University

Still stuck? Get one-to-one help from a personally interviewed subject specialist.

95% of our customers rate us

Browse tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok