. Grade 6, ILLUSTRATIVE icon
Task

Introducing Equivalent Expressions 2

Illustrative MathematicsVaries

The purpose of this series of two tasks (the previous one is here) is to highlight that while a numerical expression can only take one value, an algebraic expression can take many different values depending on the value of the variable. Furthermore, once you place that expression in a equation, it's possible that there can only be one value for the variable that makes the equation true. All work is done out of a context with positive whole numbers, so that discussion can focus on the shift from numerical to algebraic expressions.

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