Emma is 7 years old.  If her sister is 9 years older than her, how old will Emma be when her sister is 56?
Emma’s sister is 7 + 9 = <<7+9=16>>16 years old.
In this many years, Emma’s sister will be 56 years old: 56 - 16 = <<56-16=40>>40 years.
When her sister is 56 years old, Emma will be 7 + 40 = <<7+40=47>>47 years.
#### 47