4500 x = 4950 x+9，
The solution is x = 90,
It is verified that x=90 is the solution of fractional equation, which accords with the meaning of the question.
A: The first batch of T-shirts were purchased in 90 yuan;
(2) Set the remaining T-shirts at the price of Y yuan each.
According to (1), the second batch purchased 4950 99 =50 pieces.
From the meaning of the title, it means120× 50× 45+y× 50×15-4950 ≥ 650.
The solution is y ≥ 80.
A: Every remaining T-shirt should be at least 80 yuan.