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Solve the inequality. (Enter your answer using interval notation.) \[ -2 x+7>x-8 \] + Additional Materials eBook

Ask by Chavez Johnston. in the United States
Mar 10,2025

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Tutor-Verified Answer

Answer

The solution is \( x < 5 \), which in interval notation is \((-\infty, 5)\).

Solution

Solve the equation \( -2x+7>x-8 \). Solve the inequality by following steps: - step0: Solve for \(x\): \(-2x+7>x-8\) - step1: Move the expression to the left side: \(-2x-x>-8-7\) - step2: Add and subtract: \(-3x>-8-7\) - step3: Add and subtract: \(-3x>-15\) - step4: Change the signs: \(3x<15\) - step5: Divide both sides: \(\frac{3x}{3}<\frac{15}{3}\) - step6: Divide the numbers: \(x<5\) The solution to the inequality \(-2x+7>x-8\) is \(x<5\). Therefore, the solution in interval notation is \((-\infty, 5)\).

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Bonus Knowledge

To solve the inequality \(-2x + 7 > x - 8\), we start by isolating \(x\). First, we can add \(2x\) to both sides to get \(7 > 3x - 8\). Next, add \(8\) to both sides, resulting in \(15 > 3x\). Finally, divide by \(3\) to get \(5 > x\) or \(x < 5\). In interval notation, the solution is \((-∞, 5)\). Now, did you know inequalities often represent a range of possibilities? They can be used in various fields, such as economics or engineering, where constraints need to be analyzed. Understanding how to interpret these can help you grasp real-world situations better! Another fun fact: when solving inequalities, remember to flip the inequality sign if you multiply or divide by a negative number. It’s a common mistake that can lead to the wrong answer! Always double-check your operations to ensure you maintain the correct inequality direction.

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