if 25 % of x is 15 less than 12 % of 1500 , then x is ?
"25 % of x = x / 4 ; 12 % of 1500 = 12 / 100 * 1500 = 180 given that , x / 4 = 180 - 15 = > x / 4 = 165 = > x = 660 . answer : a"
divide(subtract(multiply(1500, divide(12, const_100)), 15), divide(25, const_100))