Answer
$x=-2$
Work Step by Step
A variable $x$ is said to be having a negative solution if and only if it equals to negative value after simplifying. For example, consider the equation $x+5=3$.
Simplify the equation by subtracting $5$ from both sides of $x+5=3$. Then,
$\begin{aligned}x+5-5&=3-5\\x+0&=-2\\x&=-2\end{aligned}$
Here, since the value of $x$ is finally equal to -2. It can be said that $x+5=3$ or $x=-2$ both represents a variable $x$ with negative solution.