SOL 5.19 Algebra and Variables

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What is a variable in algebra?

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A variable is a symbol, usually a letter, that stands for an unknown number.

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It represents that a box of Pop-Tarts is shared with 3 friends, and each friend gets 4 Pop-Tarts.

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What is the purpose of an equation?

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An equation shows that two expressions are equal, often used to find unknown values.

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It represents finding how many rows of 7 stamps can be made from 56 stamps.

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What is an algebraic expression?

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An algebraic expression is a combination of numbers, variables, and operations without an equality sign.

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It represents the number of students in Mrs. Falls' class, where s is the number of students in Mrs. Smith's class.

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It means that 3 times an unknown number p equals 4.

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What is the difference between an equation and an inequality?

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An equation states that two expressions are equal, while an inequality shows that one expression is greater or less than another.

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What is the solution to the problem: 'Bob has 8 pens. How many more pens does he need to get a total of 64 pens?'

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