Answer: Thus, the present age of Queens University College is 45 years, and the present age of GAGE University College is 15 years.
Step-by-step explanation: Let Q be the present age of Queens University College and G be the present age of GAGE University College.
Since the present age of Queens University College is three times that of GAGE University College, we can write the equation Q = 3G.
After 5 years, the difference of their ages will be 30 years, so we can write the equation Q + 5 = G + 30.
Substituting the first equation into the second equation, we get 3G + 5 = G + 30.
Solving for G, we find that G = 15.
Substituting this value into the equation Q = 3G, we find that Q = 3 * 15 = 45.
Thus, the present age of Queens University College is 45 years, and the present age of GAGE University College is 15 years.