Help me find the right course for math (Algebra)

Hi, Im studying for my GED as a drop out, I'm on introductions to variables and theres a question in the practice questions, And nowhere in the videos or lessons (From what i can remember, Bad memory) Did it explain how to do fraction variables and im not sure which lesson(s) i need to look at to understand how to do this equation.

This is the question in example

https://docs.google.com/document/d/1FbrYnzn-QFflMQcgr93EbD9PuGWsFAvuJcdaWk1w-8I/edit?usp=sharing

Any and all help is great!