This Khan Academy video on inequalities offers more information on solving and manipulating systems of inequalities.
Systems of Linear Inequalities is a free educational video by Khan Academy.It helps students in grades HS practice the following standards HSA.REI.D.12.
1. HSA.REI.D.12 : Graph the solutions to a linear inequality in two variables as a half-plane (excluding the boundary in the case of a strict inequality), and graph the solution set to a system of linear inequalities in two variables as the intersection of the corresponding half-planes..
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