2x+5y=200
x-y=9
Solution:
x=35
y=26
A: The prices of each T-shirt and each album are 35 yuan and 26 yuan respectively;
(2) If buying a T-shirt, buy an album (50-a).
35a+26(50-a)≥ 150035
a+26(50-a)≤ 1530
Solution: 22 2/9 ≤ A ≤ 25 2/3,
∫a is an integer,
∴a=23,24,25，
Then buy 27 albums, 26 albums and 25 albums.
Answer: ① If you buy 23 T-shirts, you will buy 27 albums; 2 buy 24 T-shirts and buy 26 albums; 3 I bought 25 T-shirts and bought 25 albums.