Answer:
Two possibilities are 8 Specialty doughnuts or, 16 glazed doughnuts.
Explanation:
Let, Marat can buy x specialty doughnuts and y glazed doughnuts.
Marat will be able to buy the doughnuts if
.
If we put x = 0 in 2x + y = 16, then y = 16.
For y = 0, x = 8.
Marat can buy 0 doughnuts or can buy some, but the total amount needs to be in between 16.