1 Answer

MichaelRSF · Answer 1 · 2019-06-07T10:29:11+0000

1. Replace f(x) with y: y = 3x - 15
2. Interchange x and y: x = 3y - 15
3. Solve this for y: 3y = x + 15, and y = (x + 15)/3
4. Replace y with

-1 -1
f (x): f (x) = (x + 15) / 3 (answer)

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