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
Answer:
12
Explanation:
x + 40 = 28
x = -12
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