# How do you write the phrase as an algebraic expression: twice the sum of 15 and a number?

May 4, 2017

See the solution explanation below:

#### Explanation:

First, let's call "a number" $n$.

Then "the sum of 15 and a number" can be written as:

$15 + n$

Now, we can write "twice the sum" as"

$2 \left(15 + n\right)$