I have the following system of linear inequalities

$$\begin{aligned} \theta\_1 + \theta\_2 &\geq 0\\ 2 \theta\_1 + k \theta\_2 &\geq 0\\ \theta\_1 + 3\theta\_2 & \leq 0\end{aligned}$$

So far, I have tried to take the $3^{\rm rd}$ equation and rewrite it as follows

$$\theta\_1 + 2\theta\_2 \leq -\theta\_2$$

Where can I go from here? And what is the easier solution to this exercise?