When filling in a double number line, make sure to look at the (the original) to see where you are going to fill in the
missing numbers.

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

since we know that the two functions are equal, f (x) = g

(x), therefore when we equate the two equations the result should be similar to

3x = x – 4:

a. f(x) = 3x, g(x) = x – 4

equating the two functions:

3x = x – 4             (correct)

so we now got our answer (a)