# Chapter 3 - Section 3.1 - Graphing Equations - Exercise Set: 59

$(-∞,-5]$

#### Work Step by Step

We are given that $3x\leq-15$. In order to solve for x, we must divide both sides by 3. $x\leq-5$ Therefore, the solution set consists of all values of x that are less than or equal to -5.

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