Mashaal Masha
$$2.5b+5r=80$$

The given equation describes the relationship between the number of birds, $b$, and the number of reptiles, $r$, that can be cared for at a pet care business on a given day. If the business cares for $16$ reptiles on a given day, how many birds can it care for on this day?
Difficulty: Medium
A: 

0

B: 

5

C: 

40

D: 

80

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