How to apply the substitution method to solve a system of equations

The video tutorial explains how to solve equations where variables are not isolated. It emphasizes identifying coefficients of 1 or -1 to simplify substitution. The process of solving for X is demonstrated, followed by applying the distributive property. The tutorial concludes by explaining infinite solutions and their graphical representation.

Describe the steps taken to rewrite the equation as mentioned in the text.

How can you determine if an equation has infinite solutions?