Answer
$8$ $gallons$ $1$ $quart$
Work Step by Step
When you first add them together you get 7 gallons and 5 quarts. But, to simplify that, because 1 gallon = 4 quarts, convert the 5 quarts to 1 gallon 1 quart. Then, add the 7 gallons and 1 gallon 1 quart. That gets you 8 gallons 1 quart.
