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prealgebra intermediate

Problem

When a water tank is full, it contains 27 gallons less than when it is empty. How many gallons of water does the tank hold when it is full?
Solution
empty is the same thing as full. Thus, 27 gallons represents the difference between and of the tank, meaning that 27 gallons is of the tank. Since half the tank is 27 gallons, the entire tank can hold .
Final answer
54\text{ gallons}