Answer:
x = 1
Explanation:
Since we know f(x) = -2, we can replace f(x) with -2 in our function and then solve for x:
![-2 = 2x -4](https://img.qammunity.org/2022/formulas/mathematics/high-school/xf3va6m7zsint1zdnkjjleu0yz4hn2x345.png)
Let's add 4 to both sides.
![2 = 2x](https://img.qammunity.org/2022/formulas/mathematics/high-school/o8rngi7wmgf08zhsw09rp0dtken2ke27v5.png)
And then divide both sides by 2.
![x=1](https://img.qammunity.org/2022/formulas/mathematics/high-school/x1mtktx3ckqtr9c9bhuvh92xozouexxxze.png)
And that's value of x, or the answer to our equation. Hopefully this was helpful... if you have more questions, let me know! :)