# How do you translate "18 more than a number" into a mathematical expression?

Feb 22, 2016

#### Answer:

$n + 18$

#### Explanation:

$\textcolor{red}{\text{Let "n" represent the unknown number.}}$

So in this instance, whenever we come across the wording "a number", we can and may use the letter $n$.

This is because we may assign to $n$ any value we so wish

The question uses the word 'expression'. This means that there is not an equals sign in what we write.

I use the symbol ? to indicate that something should be in that place. We just do not know what is yet. It will show up later.

Breaking the question down into its component parts:

18 more than:->?+18
a number:$\to n + 18$

So we start with some unknown value and put a further 18 with it. So it becomes more.

Hope this helps