Multiple Choice
Solve the given linear equation using addition and subtraction properties of equality.
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2. Linear Equations and Inequalities
The Addition and Subtraction Properties of Equality
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Identify the following as either an expression or equation.
A
Expression
B
Equation
Verified step by step guidance1
Step 1: Understand the difference between an expression and an equation. An expression is a combination of numbers, variables, and operations without an equals sign, while an equation includes an equals sign showing that two expressions are equal.
Step 2: Look at the given mathematical statement: \$4\left(a-2\right)=21$.
Step 3: Notice that this statement contains an equals sign (\(=\)), which means it is setting two quantities equal to each other.
Step 4: Since there is an equals sign, this statement is not just an expression; it is an equation.
Step 5: Therefore, identify \$4\left(a-2\right)=21$ as an equation.
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