Aunt Jane is 31 years old.
Her niece is 13 years old.
How many years ago was Aunt Jane 3 times as old as her niece?
Explain you answer. (Hint: Try creating an algebraic expression for the niece's age.)
Her niece is 13 years old.
How many years ago was Aunt Jane 3 times as old as her niece?
Explain you answer. (Hint: Try creating an algebraic expression for the niece's age.)