Answer
Solution set:$ \qquad\{ -6 \}$
Work Step by Step
Graphing with desmos.com/calculator (see image)
graph the LHS function and the RHS function in the same window.
We find the intersection point to be $(-6),$
meaning that for x=$-6$ the LHS equals the RHS,
meaning that x=$-6$ is the solution of the equation.