Then 9x+10y =1810, 12x+8y= 1880.
Calculated x=90 yuan, y= 100 yuan.
(2) Suppose you buy a B-type garment, then the A-type garment is 2a+4 pieces.
2a+4 ≤ 28 According to the meaning of the question.
(2a+4)× 18+30a≥699
The solution is 9.5≤a≤ 12.
Because a is an integer, if a= 10, 1 1 and 12 are substituted into 2a+4 respectively, we can get 24, 26 and 28.
* * * Three purchase plans. First, there are 24 pieces of A-type clothes and 24 pieces of B-type clothes 10.
The second type, type A, 26 sheets, type B 1 1 sheet.
The third type, a type with 28 pieces, b type 12 pieces.