Given the information that the average of the ages of 5 women is 47 years and that their ages are 48, y, 52, 50, and (2y-5), we can set up the following equation:
(48 + y + 52 + 50 + 2y - 5) / 5 = 47
Expanding the equation and simplifying, we get:
5y = 244
y = 48.8
So the age of the woman whose age is represented by the variable y is 48.8 years.
The oldest woman is represented by the age of 52 years, which is the largest of all the ages.
Therefore, the age of the oldest woman is 52 years.