Ah, yes, systems of linear equations. If you’re a paramedic, you’ll probably be fine and have an intuitive understanding of most of this stuff already. The jargon and notation will throw you off, probably, but you’ll probably pick it up quickly.
Practical problems you’ll face are things like: if I deliver 10 mg of a drug, and it has an uptake of 50% per hour, and a functioning liver removal rate of 10% per hour, and I want to ensure that there’s 5 mg in the patient’s bloodstream at all times, how big of a dose and how often…
But the reality is: you’ll have a table to reference and won’t likely need to calculate this on a regular basis. What you will need to do is trust the table, and for that, you have to understand how the table was made :)