# How do you solve 15n+9=21?

Aug 17, 2016

Isolate $n$.

#### Explanation:

To do this, let's subtract $9$ from each side:

$15 n = 12$

Next, let's divide each side by $15$:

$\frac{15 n}{15} = \frac{12}{15}$

$n = \frac{4}{5}$