Question

How do you find `k(4-x)` given `k(x)=4x-4`?

Answer 1

`k(4-x) = 12-4x`

Explanation:

Given:

`k(x) = 4x-4`

The variable `x` can be replaced by any other variable, e.g. `t`...

`k(t) = 4t-4`

Now substitute `4-x` for `t` to find:

`k(4-x) = 4(4-x) - 4`

`= 16-4x-4`

`= 12-4x`