Description
Students solved systems of linear equations in two variables using substitution and elimination in Grade 8 and then encountered the topic again in Algebra I when solving systems of linear equalities and inequalities. This lesson begins with a quick review of the method of elimination to solve a linear system in two variables along with an application problem. We then solve a system of equations in three variables using algebraic techniques.
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From EngageNY.org of the New York State Education Department. Algebra II Module 1, Topic C, Lesson 30.
Available from engageny.org/resource/algebra-ii-module-1-topic-c-lesson-30; accessed 2015-05-29.
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