if 25 % of x is 30 less than 15 % of 1500 , then x is ?
"25 % of x = x / 4 ; 15 % of 1500 = 15 / 100 * 1500 = 225 given that , x / 4 = 225 - 30 = > x / 4 = 195 = > x = 780 . answer : d"
divide(subtract(multiply(1500, divide(15, const_100)), 30), divide(25, const_100))