Write and Evaluate Algebraic Expressions

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What is an algebraic expression?

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What is a variable in algebra?

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What is a constant in algebra?

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What does it mean to evaluate an expression?

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To evaluate an expression means to calculate its value by substituting the variables with specific numbers.

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Write the phrase '5 less than x' as an expression.

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What is the expression for 'twice a number n'?

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