7th grade equations/inequalities

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What is an equation?

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An equation is a mathematical statement that asserts the equality of two expressions, typically containing one or more variables.

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What is an inequality?

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An inequality is a mathematical statement that compares two expressions and shows that one is greater than, less than, or not equal to the other.

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What does it mean to solve an equation?

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To solve an equation means to find the value(s) of the variable(s) that make the equation true.

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What is the equation for a situation where a fixed cost is combined with a variable cost?

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The equation is typically in the form: Fixed Cost + (Variable Cost per unit) * (Number of units) = Total Cost.

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How do you represent a situation where a quantity increases over time?

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You can represent it with an equation of the form: Total = Initial Amount + (Rate of Increase * Time).

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The equation is true.

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What does it mean for an equation to be true?

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An equation is true if both sides of the equation have the same value when the variable is replaced with a specific number.