 
 <prompt> 9 years lati ojo ti o dara, John yio jẹ 3 lori ọdun ti o ti o wulo 11 years ago. Nini o ti o ni bayi? <response>: ```Fi J jade John’s age.
Awa ni J + 9 = 3(j − 11)
Nitori pe, J + 9 = 3J − 33
Nitori pe, 9 = 2J − 33
Nitori pe, 42 = 2J
Tani pe owo John ni J = 42 / 2 = 21

Awọn iwọ yoo wa ni 21.``` 