ACT - Question 52 is a free educational video by MathPlanetVideos.It helps students in grades HS practice the following standards HSA.REI.C.5, HSA.REI.C.6,.
1. HSA.REI.C.5 : Prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.
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