Answer
$x=-2$
Work Step by Step
$$\begin{align*}
-2x-3x&=3x+10-3x &\text{Subtract $3x$ from each side.}\\
-5x&=10 &\text{Simplify.}\\
\frac{-5x}{-5}&=\frac{10}{-5} &\text{Divide $-5$ to both sides.}\\
x&=-2 &\text{Simplify.}
\end{align*}$$
Check if the answer is correct by substituting $-2$ to the variable in the given equation.
$$\begin{align*}
-2x&=3x+10\\
-2(-2)&\stackrel{?}{=}3(-2)+10\\
4&\stackrel{?}{=}-6+10\\
4&\stackrel{\checkmark}{=}4
\end{align*}$$
