#### Answer

$(-\infty, \frac{6}{5}]$
Refer to the image below for the graph.

#### Work Step by Step

Divide by $5$ on both sides to obtain:
$x \le \dfrac{6}{5}$
The solution set is the set of real numbers less than or equal to $\frac{6}{5}$.
In interval notation, the solution set is:
$(-\infty, \frac{6}{5}]$
To graph this inequality, plot a solid dot at $\frac{6}{5}$ then shade the region to its left.
(refer to the attached image in the answer part)