## Precalculus (6th Edition) Blitzer

The value of $x$ is $-3$.
Add $4$ to both sides of the provided equation to get \begin{align} & -2x-4+4=x+5+4 \\ & -2x=x+9 \\ \end{align} Subtract $x$ from both sides of the above equation \begin{align} & -2x-x=x+9-x \\ & -3x=9 \\ \end{align} Divide both sides of the above equation by $-3$: \begin{align} & \frac{-3x}{-3}=\frac{9}{-3} \\ & x=-3 \end{align} Therefore, the value of is $-3$.