Answer:
4 personal training sessions
Explanation:
$25 + $30 = the month membership + 1 training session = $55
$75 + $20 = the month membership + 1 traing session = $95
then you would add every time she went to get a training session till you get the same number
$55 + $30 = 2 sessions and so on
$95 + $20 = 2 sessions and so on