How do you find the inverse of the function $f(x)=1/2x+10$ ?

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Answer 1 · 2017-01-30T12:15:58

I got $f(x)=2x-20$

We isolate $x$ :
$1/2x=f(x)-10$
$x=2f(x)-20$
We swap $x$ with $f(x)$ :
$f(x)=2x-20$

How do you find the inverse of the function f(x)=1/2x+10f(x)=1/2x+10?