Jay needs 19 courts more paint for the outside of his barn then the inside if uses 107 quarts in all how many gallons of paint would be used to paint the inside of the barn

the given 6 = w/p is equivalent to 6p = w, where w is the total area of the walls and p is the area covered by a single can of paint.

knowing that 6 cans of paint will be needed, 6p = w becomes 6(6) = w = 36.   this tells us that the total area to be painted is 36 square units.