The video tutorial explains the process of using subtraction to solve equations. It begins by introducing the concept of subtraction as an alternative to addition for eliminating variables. The instructor emphasizes the importance of using parentheses when subtracting one equation from another to avoid confusion. The tutorial then demonstrates solving equations by subtracting, highlighting the handling of double negatives. The process is shown to yield the same result as addition, providing a different method to reach the solution. The video concludes with a recap of the subtraction method and its application in solving equations.

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