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Lesson Plan

Solve a system of equations in different forms using substitution

teaches Common Core State Standards CCSS.Math.Content.8.EE.C.8b
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Big Ideas: Exact solutions of linear systems can be found algebraically through substitution. A system of linear equations, where one is in slope intercept form and the other in standard form, can be solved by using the substitution property of equality. Students will algebraically solve linear systems that have their equations in both slope-intercept form and standard form by using substitution. In this task, they will use the information about one variable to solve for another and, thus, solve the linear system. Vocabulary: substitution, standard form, slope-intercept form
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