Answer:
11 gallons
Explanation:
Let x represent the number of quarts needed for the inside of the barn. Then total amount of paint used is ...
x +(x +19) = 107
2x = 88 . . . . . . . . subtract 19
x = 44 . . . . . . . . . divide by 2
Since there are 4 quarts in a gallon, 44 quarts is 11 gallons.
Jay needs 11 gallons of paint for the inside of the barn.