Question

Which equation models the problem below if c represents the number of puppies whose eyes are closed?

There are 15 puppies in a photograph, and 11 of them have their eyes open.
How many puppies have their eyes closed?



c – 11 = 15

11 – c = 15

15 + c = 11

11 + c = 15

Answer 1

11+c=15

Explanation:

4 pups have their eyes closed

Answer 2

First you must take into account the variable that is being defined for this case:
c = represents the number of puppies whose eyes are closed.
We can then write the following equation:
15 = 11 + c
Rewriting the equation:
11 + c = 15
Clearing c:
c = 15-11
c = 4
4 puppies have their eyes closed
Answer:
11 + c = 15
4 puppies have their eyes closed