Add 1 to a number, subtract 2, multiply by 3, and divide by 4 to get 9

Add 1 to a number, subtract 2, multiply by 3, and divide by 4 to get 9

9 × 4 / 3 + 2-1 = 36 / 3 + 2-1 = 12 + 2-1 = 13 A: this number is 13