Question

Question #cb859

Answer 1

`y + y - 3 > 11`

or

`2y - 3 > 11`

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 `y`.

"Lauren is three years younger than her brother" - because we know her brother is `y` we then know this phrase can be written as:

`y - 3`.

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

`y + y - 3`

"is greater than" means simply `>`

or combining the terms so far:

`y + y - 3 >`

Finally, what is it greater than? It is greater than `11` giving:

`y + y - 3 > 11`