Question

Artaud noticed that if he takes the opposite of his age and adds 39 he gets the number 24. How old is Artaud?

Answer 1

Answer: 15 years old

Explanation:

Let x be Artaud's age. Let the opposite of his age be -x

-x + 39 = 24

-x = 24-39

-x = -15 (multiply both sides by -1)

x = 15 years old

Answer 2

15

Explanation:

Let 'a' represent Artaud's age. He notices the relationship ...

-a +39 = 24

If we add a-24 to both sides, we get ...

15 = a

Artaud is 15 years old.