a box contain the number of balls which is as much greater than 20 is less than 30 . the number of balls is ?
"answer let the number be x . then , x - 20 = 30 - x â ‡ ’ 2 x = 30 + 20 = 50 â ‡ ’ 2 x = 50 â ˆ ´ x = 25 correct option : b"
divide(add(30, 20), const_2)