# Ann is 12 years old. Her mother is 3 times as old as Ann. How many years ago was her mother 4 times as old as Ann?

##### 2 Answers

May 11, 2018

4 years ago

#### Explanation:

If we call Ann´s age A and mother´s age M:

, a few years back ( Y ):

So, by substitution:

May 11, 2018

#### Explanation:

We know both of their present ages.

If Ann is

A number of years ago,they were both younger.

Let the number of years be

Ann's age was

It was

Check: Ann was