Trevor's older brother was twice his age 20 years ago. How old was Trevor a decade ago if his brother is now 32 years old? Give me reasons, before answering the question
If Trevor's brother is 32 years old today then 20 years ago he was = 32 - 20 = 12 years old. If Trevor's brother was 12 years old and he was twice Trevor's age, then Trevor was 12 / 2 = 6 years old. If Trevor was 6 years old 20 years ago, then he must be 6 + 20 = 26 years old today. If Trevor is 26 years old today then a decade ago he must have been 26 - 10 = 16 years old. So the final answer is 16.