Solve a system of equations by substitution when both y variables are isolated

The video tutorial demonstrates how to solve a system of equations using substitution. It begins by explaining the substitution method, where one variable's value is replaced in another equation. The tutorial then guides through setting up an equation with a single variable, solving for X, and subsequently using that value to solve for Y. The solution set is determined as X = 2.5 and Y = -5.

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