( SOMEONE ANSWER PLEASE ) [ I WILL GIVE BRAINLIEST ] to the person who can explain as to how to do an equation like this. I need an explanation because I want to understand the concept. How do you do an equation like this? ( LOOK AT IMAGE PLEASE )

use this:

https://www.wikihow.com/Algebraically-Find-the-Inverse-of-a-Function#:~:text=1%20Write%20your%20function%2C%20replacing%20f%20%28x%29%20with,constant%20into%20the%20original%20function%20for%20x.%20

understand that i don't know the answers

will someone answer his question