Artaud noticed that if he takes the opposite of his age and adds 40 he gets the number 28. How old Artaud?

12

Step-by-step explanation:

x + 40 = 28

x = - 12

Answer: Artaud is 12 years old.

Step-by-step explanation: I started by finding the difference between 40 and 28.

40 - 28 = 12

So since he is taking the opposite of his age he must have done - 12 because:

-12 + 40 = 28