if 3 < x < 6 < y < 10 , then what is the greatest possible positive integer difference of x and y ?
"3 < x < 6 < y < 10 ; 3 < x y < 10 3 + y < x + 10 y - x < 7 . positive integer difference is 6 ( for example y = 9.5 and x = 3.5 ) answer : d ."
subtract(subtract(10, 3), const_1)