a number is doubled and 5 is added . if the resultant is trebled , it becomes 135 . what is that number ?
"explanation : let the number be x . therefore , 3 ( 2 x + 5 ) = 135 6 x + 15 = 135 6 x = 120 x = 20 answer : c"
divide(subtract(135, multiply(const_3, 5)), multiply(const_3, const_2))