Learn about the substitution method, which is another way to manipulate systems of equations in order to solve them.
7249_Systems_of_equations_with_substitution_potato_chips.html
7250_Systems_of_equations_with_substitution_3x_4y_2_y_2x_5.html
All video content by Khan Academy is under their license: CC by NC SA
Website created using Khan Academy Static Downloader