a number is doubled and 15 is added . if the resultant is multiplied by 5 , it becomes 125 . what is that number ?
"solution let the number be x . then , 5 ( 2 x + 15 ) ‹ = › 125 ‹ = › 2 x + 15 = 25 ‹ = › 2 x = 10 x = 5 . answer d"
divide(subtract(5, multiply(const_3, 15)), multiply(const_3, const_2))