Question

Find f(x) if it is known that f(x−2)=2x−4.

Answer 1

Hi,
Let assume y=x-2, so x=y+2

$f(x-2)=2x-4\\ f(y)=2(y+2)-4\\ f(y)=2y+4-4\\ f(y)=2y$
f(x)=2x