Whats the elapsed time between 2: 20pm to 3: 05pm?

45 minutes. 2:20 pm + 40 minutes =3:00 pm+ 5 minutes = 3:05pm. Therefore, the answer is 45 minutes.

The answer would be 7 cages

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.