60 (600x)+80x

≤

44000

Remove the bracket and get

36000-60 times +80 times

≤

44000

Move items, get

-60 times +80 times

≤

44000-36000

Merge similar projects to obtain

20x

≤

8000

The coefficient becomes 1, and we get

x≤400

Answer: You can buy up to 400 seedlings.

(2): Let A sapling be X, then B sapling be (600-x).

88%x+96%(600-x)≥

600×90%

Remove the bracket and get

88%x+576-96%x

≥

600×90%

Move items, get

88%x-96%x

≥

600×90%-576

Merge similar projects to obtain

-8%x

≥

-36

The coefficient becomes 1, and we get

x

≥

450

B sapling is

600 x

=

600-450= 150

Answer: You can buy at least 150 saplings.