Answer:
3 bottles will hold the given amount of water of 51 ounces.
Explanation:
Let Elena has number of bottles = x
Each bottle holds 17 ounces of fluid.
So the total amount of water = 17x ounces
Since total amount of water has been given = 51 ounces
So 17x = 51
x =

x = 3 bottles
Therefore, 3 bottles will hold the given amount of water of 51 ounces.