OG Quant Reasoning Practice Book Question

I’m struggling with the Algebra section on page 67 version 2 of the OG Quant practice book. Is this normal?

I’m on week 6 of the two month plan and a lot of these problems seem tough to me. Just need some words of encouragement if possible :frowning:

Can you post the question?

It’s difficult to post but I’m having trouble with question numbers 13,14,15, and 16.