Solve |5x - 7| > 2x + 1: Absolute Value Inequality Challenge

Given:

5x7>2x+1 \left|5x - 7\right| > 2x + 1

Which of the following statements is necessarily true?

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1

Understand the problem

Given:

5x7>2x+1 \left|5x - 7\right| > 2x + 1

Which of the following statements is necessarily true?

2

Step-by-step solution

To solve the inequality 5x7>2x+1 \left|5x - 7\right| > 2x + 1 , we consider two scenarios for the absolute value expression.

Case 1: 5x7>2x+1 5x - 7 > 2x + 1

Rearrange terms:

5x2x>1+7 5x - 2x > 1 + 7

3x>8 3x > 8

x>83 x > \frac{8}{3}

Case 2: (5x7)>2x+1 -(5x - 7) > 2x + 1

This simplifies to:

5x+7>2x+1 -5x + 7 > 2x + 1

Rearrange terms:

71>2x+5x 7 - 1 > 2x + 5x

6>7x 6 > 7x

x<67 x < \frac{6}{7}

Hence, the solution combines both cases as:

x<67 or x>83 x < \frac{6}{7} \text{ or } x > \frac{8}{3}

3

Final Answer

x<67 or x>83 x < \frac{6}{7} \text{ or } x > \frac{8}{3}

Practice Quiz

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Given:

\( \left|2x-1\right|>-10 \)

Which of the following statements is necessarily true?

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