Beau’s sons are triplets.  They are 16 years old today.  Three years ago, the sum of his 3 sons’ ages equaled Beau’s age.  How old is Beau today? Let's think step by step and output the final answer after "####".
user
Three years ago, his sons were 16 - 3 = <<16-3=13>>13 years old.
Three years ago, Beau was 13 + 13 + 13 = <<13+13+13=39>>39 years old.
Today, Beau is 39 + 3 = <<39+3=42>>42 years old.
#### 42
Beau’s sons are triplets.  They are 16 years old today.  Three years ago, the sum of his 3 sons’ ages equaled Beau’s age.  How old is Beau today?
train