Answer:
13.92 gallons
Explanation:
To figure this out you need to do 19.22-5.3 because 19.22 is how much fuel you started with and 5.3 is how much you have now. So by subtracting them, you can find the amount of fuel he used. 19.22-5.3=13.92
He used 13.92 gallons of gas.
19.22-5.3=13.92
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