Then: 2000 x× 3 = 6300 x+4.

Solution: x = 80.

It is verified that x=80 is the root of the original equation.

A: The purchase price of the first batch of clothes was 80 yuan.

(2) Let the profit of the first batch of clothes be A yuan, then the profit of the second batch of clothes is (2075-a) yuan.

a2000× 100%=2075？ a6300× 100%，

Solution: a=500,

Then 2075-500= 1575 (yuan),

Price of the first batch of clothes: 80+500÷(2000÷80)= 100 (Yuan),

Price of the second batch of clothes: 80+4+1575 ÷ (6300 ÷ 84) =105 (yuan).

A: The price of the first batch of clothes is 100 yuan, and the price of the second batch of clothes is 105 yuan.