Using supplementary angles to solve for the missing variable ex 19

The video tutorial demonstrates how to solve for the variable X in a linear equation by using the concept of supplementary angles. It explains that angles forming a straight line add up to 180 degrees, allowing the setup of an equation. The tutorial then shows how to combine like terms and solve the equation to find the value of X.

What is the relationship between the angles discussed in the text?

How do you derive the equation for X from the supplementary angles?

What does the equation X + 3X - 20 = 180 represent?

Explain the steps taken to solve for X in the given equation.

What is the final value of X after solving the equation?