Answer
$\color{blue}{x=-10}$
Work Step by Step
Subtract $45$ from each side to obtain:
\begin{align*}
4x+45-45&=5-45\\
4x&=-40\end{align*}
Divide both sides by $4$ to obtain:
\begin{align*}
\frac{4x}{4}&=\frac{-40}{4}\\\\
x&=-10\end{align*}
Therefore, the solution is $\color{blue}{x=-10}$.
