$[4, +\infty)$ Refer to the image below for the graph.
Work Step by Step
Divide by $2$ on both sides to obtain: $x \ge 4$ The solution set is the set of real numbers greater than or equal to $4$. In interval notation, the solution set is: $[4, +\infty)$ To graph this inequality, plot a solid dot at $x=4$ then shade the region to its right. (refer to the attached image in the answer part)