I prefer to keep my cardio sessions separate to my strength training. If you’re going to practise two in one though, I suggest scheduling your cardio AFTER your strength training.
Fat loss benefit:
You are already in your fat burning zone if your cardio succeeds a weight training session, where as if you start with it, your body will first use up its glycogen stores as energy before burning fat.
Muscle gain benefit:
If you do your cardio first, your body will deplete your glycogen stores in your muscles, so when you get round to weight training, your session will not be as effective. You will also be tired and less motivated for heavier, muscle-buildng sets.