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3. Removing the grouping symbols, in other words, using the distributive property to eliminate the parentheses, can be challenging. List whether or not the distribution is correct. If not correct, state why it is not correct for the following equation with parentheses: \( -5(x+4)+2-(5 x-8)=-24 \) List if Correct, if not correct then state why incorrect. 3A: \( \quad-5 x+20+2-5 x \) +8 \( =-24 \) 3B: \( \quad-5 x-20-2-5 x+ \) 8 \( =-24 \) 3C: \( \quad-5 x-20-10-5 x \) \( +8=-24 \) 3D: \( \quad-5 x-20+2-5 x- \) \( 8=-24 \) 3E: \( \quad-5 x-20+2-5 x+ \) \( 8=-24 \)

Ask by Mann Crawford. in the United States
Jan 30,2025

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Tutor-Verified Answer

Answer

**Correct Distribution:** 3E: \(-5x - 20 + 2 - 5x + 8 = -24\) **Incorrect Distributions:** 3A, 3B, 3C, 3D

Solution

Let's evaluate each distribution (3A to 3E) for the equation: \[ -5(x + 4) + 2 - (5x - 8) = -24 \] **Correct Distribution Process:** 1. **Distribute \(-5\) to \((x + 4)\):** \[ -5 \cdot x = -5x \] \[ -5 \cdot 4 = -20 \] So, \(-5(x + 4) = -5x - 20\). 2. **Distribute \(-1\) to \((5x - 8)\):** \[ -1 \cdot 5x = -5x \] \[ -1 \cdot (-8) = +8 \] So, \(- (5x - 8) = -5x + 8\). 3. **Combine all terms:** \[ -5x - 20 + 2 - 5x + 8 = -24 \] Simplify: \[ -10x - 10 = -24 \] --- ### Evaluation of Each Option: **3A:** \[ -5x + 20 + 2 - 5x + 8 = -24 \] - **Status:** ❌ **Incorrect** - **Reason:** - The distribution of \(-5(x + 4)\) is incorrectly performed. It should be \(-5x - 20\), not \(-5x + 20\). --- **3B:** \[ -5x - 20 - 2 - 5x + 8 = -24 \] - **Status:** ❌ **Incorrect** - **Reason:** - The constant \(+2\) is incorrectly distributed as \(-2\). --- **3C:** \[ -5x - 20 - 10 - 5x + 8 = -24 \] - **Status:** ❌ **Incorrect** - **Reason:** - The constants are miscalculated. The \(+2\) and \(+8\) should combine to \(+10\), not \(-10\). --- **3D:** \[ -5x - 20 + 2 - 5x - 8 = -24 \] - **Status:** ❌ **Incorrect** - **Reason:** - The distribution of \(-(5x - 8)\) is incorrect. It should be \(-5x + 8\), not \(-5x - 8\). --- **3E:** \[ -5x - 20 + 2 - 5x + 8 = -24 \] - **Status:** ✔️ **Correct** --- ### Summary: - **Correct Distribution:** **3E** - **Incorrect Distributions:** **3A, 3B, 3C, 3D** Each incorrect option fails due to improper application of the distributive property, either by incorrectly handling the signs or miscalculating the constants.

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For the equation \( -5(x+4)+2-(5 x-8)=-24 \): 3A: Correct! The distribution properly combines terms from \( -5(x+4) \), yielding \( -5x - 20 \), and maintains the structure of the equation with other terms. 3B: Not correct. The issue arises because it incorrectly represents the distribution of \( -5 \) across \( (x + 4) \) and mishandles the subtraction of \( (5x - 8) \). The \( 20 \) in this context should be negative, not positive, affecting the overall balance. 3C: Not correct. This attempt misapplies the distribution; the signs have been mishandled. The correct application should not have a \( -10 \) term, as it does not follow from the original equation. 3D: Not correct. Similar to previous responses, the extra negative in front of the \( 8 \) stems from misapplying the operation rather than actual distribution, leading to incorrect simplification. 3E: Correct! This expression accurately follows the distribution and handles the signs properly, leading to an accurate equation balance on both sides.

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