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What is the value of the expression below when \( x=3 \) ? \[ 7 x+2 \]

Ask by Rogers Hamilton. in the United States
Feb 22,2025

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The value of the expression is 23.

Solución

To evaluate the expression 7x + 2 when x = 3, substitute 3 in place of x: 7(3) + 2 = 21 + 2 = 23 Thus, the value of the expression is 23.

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Beyond the Answer

Let's plug in the value of \( x = 3 \) into the expression \( 7x + 2 \). First, calculate \( 7 \times 3 = 21 \). Then, add 2: \[ 21 + 2 = 23. \] So, when \( x = 3 \), the value of the expression \( 7x + 2 \) is \( 23 \). Now, let's make math a bit more fun! Did you know that in ancient times, mathematicians like Euclid laid down the foundations of geometry and algebra? They would find joy not just in solving problems but also in exploring patterns and relationships—an approach we still cherish today! Speaking of problem-solving, a common mistake when evaluating expressions is forgetting to follow the order of operations. Always remember PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction) to avoid any mix-ups! Happy calculating!

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