I’m concerned that you’re practicing bad habits. Please retry 5.46 and 5.55, but focus on following step by step instructions not on solving them. Here’s a method with three sections.
In the first section, put useful information like what some letters stand for or what some numbers from the problem mean. Then put a section divider line.
In the second section, put equations based on the problem statement without doing any calculations. If you have extra equations, mark which ones you plan to use for solving the problem. Then put a section divider line.
In the third section, put calculations. But don’t do that yet. Stop after two sections.