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Select the correct answer. Which algebraic expression is equivalent to the expression below? \[ \begin{array}{ll}3(5 x+7)-6(4-2 x) \\ \begin{array}{ll}\text { O } & 12 x+27 \\ \text { O } & 12 x+3\end{array} \\ \begin{array}{ll}-12\end{array} \\ 27 x-12\end{array} \]

Ask by Schwartz Rojas. in the United States
Mar 09,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

The correct equivalent expression is \( 27x - 3 \).

Solution

Simplify the expression by following steps: - step0: Subtract the terms: \(3\left(5x+7\right)-6\left(4-2x\right)\) - step1: Expand the expression: \(15x+21-6\left(4-2x\right)\) - step2: Expand the expression: \(15x+21-24+12x\) - step3: Add the terms: \(27x-3\) To simplify the expression \( 3(5x + 7) - 6(4 - 2x) \), we can follow these steps: 1. **Distribute the terms**: - For \( 3(5x + 7) \): \[ 3 \cdot 5x + 3 \cdot 7 = 15x + 21 \] - For \( -6(4 - 2x) \): \[ -6 \cdot 4 + (-6) \cdot (-2x) = -24 + 12x \] 2. **Combine the results**: \[ 15x + 21 - 24 + 12x \] 3. **Combine like terms**: - Combine \( 15x \) and \( 12x \): \[ 15x + 12x = 27x \] - Combine \( 21 \) and \( -24 \): \[ 21 - 24 = -3 \] Thus, the simplified expression is: \[ 27x - 3 \] Now, comparing this with the provided options: - \( 12x + 27 \) - \( 12x + 3 \) - \( -12 \) - \( 27x - 12 \) None of the options match \( 27x - 3 \). Therefore, it seems there might be an error in the options provided. The correct equivalent expression is \( 27x - 3 \).

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The Deep Dive

To find the equivalent algebraic expression, let's simplify the given expression: First, distribute the numbers: \[ 3(5x + 7) = 15x + 21 \] \[ -6(4 - 2x) = -24 + 12x \] Now, combine these results: \[ 15x + 21 - 24 + 12x = (15x + 12x) + (21 - 24) = 27x - 3 \] So the simplified expression is \( 27x - 3 \). Now, about keeping your math skills sharp: practicing with a mixture of exercises ranging from basic to advanced can help solidify your understanding! Try varying the types of problems and even incorporate some word problems to make it more engaging. Finally, don’t forget to double-check your work! Rushing through steps can lead to simple mistakes. If you think you got the answer but your gut says otherwise, take a moment to verify your calculations.

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