Question
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Solve the following inequality for \( d \). Write your answer in simplest form. \[ -8+3(-2 d-8) \leq-8 d+4+7 d \]

Ask by Fowler King. in the United States
Jan 22,2025

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Tutor-Verified Answer

Answer

\( d \geq -\frac{36}{5} \)

Solution

To solve the inequality: \[ -8 + 3(-2d - 8) \leq -8d + 4 + 7d \] Let's simplify both sides step by step. **Step 1: Distribute and simplify each side** **Left Side:** \[ -8 + 3(-2d - 8) = -8 + (-6d) + (-24) = -6d - 32 \] **Right Side:** \[ -8d + 4 + 7d = (-8d + 7d) + 4 = -d + 4 \] So, the inequality becomes: \[ -6d - 32 \leq -d + 4 \] **Step 2: Isolate the variable \( d \)** 1. **Add \( 6d \) to both sides:** \[ -6d - 32 + 6d \leq -d + 6d + 4 \\ -32 \leq 5d + 4 \] 2. **Subtract 4 from both sides:** \[ -32 - 4 \leq 5d \\ -36 \leq 5d \] 3. **Divide both sides by 5:** \[ \frac{-36}{5} \leq d \\ d \geq \frac{-36}{5} \] **Final Answer:** \[ d \geq -\frac{36}{5} \]

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Bonus Knowledge

To solve the inequality \(-8 + 3(-2d - 8) \leq -8d + 4 + 7d\), we will start by simplifying both sides. 1. Distribute on the left side: \[ -8 + 3(-2d) + 3(-8) \leq -8d + 4 + 7d \] \[ -8 - 6d - 24 \leq -8d + 4 + 7d \] Combine like terms on the left side: \[ -32 - 6d \leq -8d + 4 + 7d \] 2. Simplifying the right side: \[ -32 - 6d \leq (-8d + 7d + 4) \] \[ -32 - 6d \leq -d + 4 \] 3. Next, we will isolate \(d\) on one side. Let's add \(d\) to both sides: \[ -32 - 6d + d \leq 4 \] \[ -32 - 5d \leq 4 \] 4. Now, add 32 to both sides: \[ -5d \leq 4 + 32 \] \[ -5d \leq 36 \] 5. Finally, divide both sides by \(-5\). (Remember to reverse the inequality when dividing by a negative number): \[ d \geq -\frac{36}{5} \] Thus, the solution to the inequality in simplest form is: \[ d \geq -\frac{36}{5} \]

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