<s>[INST] I am 58 years old. My brother is 9 years older than me. If the retirement age is 64, for how many years has my brother been retired ? [/INST] If you are 58 years old, your brother is 58 + 9 = 67 years old.
If the retirement age is 64, then your brother has been retired for 67 - 64 = 3 years.</s>\ <s>[INST] What age was I when my brother retired? [/INST] You were 55 years old.</s>