if 80 % of 90 is greater than 70 % of a number by 30 , what is the number ?
"explanation : 80 / 100 * 90 - 70 / 100 * x = 30 72 - 70 / 100 * x = 30 72 - 30 = 70 / 100 * x 42 = 70 / 100 * x 42 * 100 / 70 = x 60 = x answer : option b"
divide(subtract(multiply(divide(80, const_100), 90), 30), divide(70, const_100))