Answer
$x=-\dfrac{7}{b}$
Work Step by Step
$b$ is a nonzero constant so both sides of the equation can be divided by $b$.
$$\begin{align*}
\frac{bx}{b}&=\frac{-7}{b} &\text{Divide b to both sides.}\\
x&=-\frac{7}{b} &\text{Simplify.}
\end{align*}$$
