Answer:
f(a - 4) = 3a - 10
Explanation:
As given, we have here, an original equation: f(x) = 3x + 2.
To work out f(a - 4), we substitute x = a - 4 into original equation.
f(a - 4) = 3(a - 4) + 2
We apply the distributive property to keep going.
f(a - 4) = 3a - 3*4 + 2
We perform the multiplication of 3 and 4.
f(a - 4) = 3a - 12 + 2
We perform the addition of (-12) and 2 to finalize the answer.
f(a - 4) = 3a - 10
This is the final answer
I hope this helps!