Answer:
The answer is C.
Explanation:
16,788 - 4x = y
Just put 164 for x since that's how many days will have passed.
16,788 - 5(164) = y
5 x 164 = 820
Then, subtract 820 from 16,788 to see how many gallons will remain.
16,788 - 820= 15,968
C
5x164=820
16,788-820=15,968
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