**Tags: CCSS, common core, middle grades mathematics, equivalent expressions, distributive property, associative property, commutative property, like terms**

Tags: Equivalent-expressions, like-terms, linear-expressions

Tags: Equivalent-expressions, linear-expressions, like-terms

Tags: Equivalent-expressions, linear-expressions, distributive-property

Tags: Equivalent-expressions, linear-expressions, simplifying-expressions, properties-of-addition-and-multiplication