Jill has 7 gallons of water stored in quart, half-gallon, and one gallon jars. She has equal numbers of each size jar holding the liquid. What is the total number of water filled jars?	Choose the correct answer.
A) 3
B) 6
C) 9
D) 12
E) 14
Let the number of each size of jar = w
then 1/4w + 1/2w + w = 7 1 3/4w = 7
w=4
The total number of jars = 3w =12
Answer: 12
<result>D</result>
Jill has 7 gallons of water stored in quart, half-gallon, and one gallon jars. She has equal numbers of each size jar holding the liquid. What is the total number of water filled jars?