Charlie:
Let the cost of the shorts (least expensive) be x dollars.
The cost for the tshirt is $(x+9).
The cost for the skirt is $(x+9) + 7 for the skirt.
Her total cost is x + x + 9 + x + 9 + 7 = 3x + 25 dollars. We are given that this total cost is $79
So, equating, we get 3x + 25 = 79, that is 3x = 54. Hence x = 18, the dollar cost of the shorts.
The dollar cost of the skirt is therefore 18 + 9 + 7 = 34.
Dattaprabhakar (Dr. G.)
8/28/2014

Dattaprabhakar G.