Common Core State Standard: 6.EE.6

Grade 6
Subject MATH
Domain Expressions & Equations
Theme Reason about and solve one-variable equations and inequalities
Standard Reason about and solve one-variable equations and inequalities. Use variables to represent numbers and write expressions when solving a real-world or mathematical problem; understand that a variable can represent an unknown number, or, depending on the purpose at hand, any number in a specified set.
Reference URL http://www.corestandards.org/Math/Content/6/EE
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