Using a linear pair to solve for the missing variable ex 18

The video tutorial explains the angle relationships in two intersecting lines, focusing on vertical angles and linear pairs. It describes how vertical angles share a vertex but not sides, while linear pairs form a straight line and are supplementary. The tutorial demonstrates solving for a missing angle using the linear pair property, showing that the angles add up to 180 degrees.

How do you set up an equation for a linear pair of angles?

What is the solution for the variable X in the equation X + 2X = 180 degrees?