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Berkeley City College

Pre-Algebra: Lesson 077

Variables and Expressions
Modeling Expressions

Lesson Description

Students learn that real-world situations can be modeled through expressions that use a variable to represent the unknown value. For example: Charles is 6 years younger than Buddy. If b = Buddy’s age, write an expression for Charles’ age. (Since b represents Buddy’s age, and Charles is 6 years younger than Buddy, then Charles’ age can be represented as b - 6.)

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