Ember is half as old as Nate who is 14.  When she is 14 herself, how old will Nate be?
Ember is 14 / 2 = <T>divide(14, 2)=7.0 years old.
When she is 14, Nate will be 14 + 7 = <T>add(14, 7)=21 years old.
