Solve Systems of Equations Easy Medium Hard

The video tutorial explains how to solve systems of equations using the elimination method. It covers three examples of varying difficulty: easy, medium, and hard. The easy example involves straightforward addition of equations, the medium example introduces scalar multiplication to align coefficients, and the hard example requires finding the least common multiple of coefficients. The tutorial emphasizes the importance of aligning variables and using parentheses to avoid mistakes. It concludes with a summary and directs viewers to additional resources.

Describe how to use a scalar to facilitate the elimination of a variable.

What is the significance of using parentheses when substituting values into equations?

How do you find the least common multiple of coefficients when solving systems of equations?