# Question #cb859

##### 1 Answer

Jan 13, 2017

or

#### Explanation:

Let's parse the sentences in the question out one phrase at a time.

"her brother, who is y years old" can be written simply as

"Lauren is three years younger than her brother" - because we know her brother is

"The sum of their ages" means to add their two ages together:

"is greater than" means simply

or combining the terms so far:

Finally, what is it greater than? It is greater than