Homework Statement
Given f(x) = 1-x
Show that 2f(3x + 1) = -6x
Homework Equations
The Attempt at a Solution
I've tried many approaches, but I seem to be missing something. The latest approach was as follows and did not work.
Divide by 2.
f(3x + 1) = -3x
f(3x) + f(1) = -3x...