A gas station sells regular gasoline for $2.39 per gallon and premium gasoline for $2.79 per gallon. If the gas station sold a total of 550 gallons of both types of gasoline in one day for a total of $1,344.50, how many gallons of premium gasoline were sold?
Answer: 75
Explanation
2.39x + 2.79y = 1344.50
where x + y = 550.
Solving the equations, we get:
y = 75
So, 75 gallons of premium gasoline were sold.
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