Learn how to solve a system with substitution

The video tutorial explains how to solve a system of equations by first identifying a variable with a coefficient of 1 or -1. The process involves rewriting the equation to solve for one variable, substituting its value into another equation, and then solving for the second variable. The tutorial emphasizes the importance of using parentheses during substitution to apply the distributive property correctly. Finally, the solution for both variables is found, demonstrating the method of solving such equations.

Why is it important to use parentheses when substituting values into equations?

What is the final solution for X and Y as stated in the text?