Then:

28x+22y & lt； =300

x & gt=y/2

x & gt0

y & gt0

Simultaneous solution:

There are many schemes, because you have no objective function! ! ! ! !

They are:

Jiayi

1 1

1 2

2 1

2 2

2 3

2 4

3 1

3 2

3 3

3 4

3 5

3 6

4 1

4 2

4 3

4 4

4 5

4 6

4 7

4 8

5 1

5 2

5 3

5 4

5 5

5 6

5 7

6 1

6 2

6 3

6 4

6 5

6 6

6 7

7 1

7 2

7 3

7 4

7 1

8 1

8 2

8 1

9 1

9 2

* * * 43 species