Question

Let f(x) = 2x - 6. Solve f-1(x) when x = 2.
y = 2x -6
x = 2y -6
2 = 2y -6
+6 +6

8 = 2y
4 = y?

Answer 1

HI!!
translate as
\[2x-6=2\] solve for \(x\)

Answer 2

you get 4 in your head

Answer 3

So, it's 4.
Yay! I understand stuff now! Thanks.