Khan Academy is a nonprofit with the mission of providing a free world-class education for anyone anywhere. In addition the exercises that accompany the video do not have any negative coefficients or negative solutions from what I can see although there is subtraction which indicates that there are negative constants. Solving Linear Systems by Substitution.
Your equations are 6x - 2y 6 and -x 2y 4.
Systems of equations and inequalities. Learn for free about math art computer programming economics physics chemistry biology medicine finance history and more. Your equations are 6x - 2y 6 and -x 2y 4. Next we can set two expressions equal to each other by creating an equation.