Below are a range of different resources to help prepare you for the progress test. It is up to you how much you interact with these resources, however the more you practice the better your understanding will be.
VIDEOS
Basic solving equations
Solving equations involving fractions
RESOURCES
It is really important that you can solve simple equations with ease.
Have a good look at the videos to refresh your methods first. Here are some really good questions and answers for you to try.