I have spent quite long on this but not able to solve it. Pls help ! Thanks!

Answer:
Adriana= $960
Tania= $1080
Step-by-step explanation:
Please see the attached pictures for the full solution.
• Do note that you could also use 'x' or other variables to represent the amount of money either Adriana or Tania brought for shopping. A unit was used in this case since I used model method to represent the given situation.