Math Problem Statement

Solve the inequality. StartAbsoluteValue 3 x plus one half EndAbsoluteValue minus 4 less than 6 Question content area bottom Part 1 S

Solution

To solve the inequality 3x+124<6|3x + \frac{1}{2}| - 4 < 6, follow these steps:

Step 1: Isolate the absolute value expression

First, add 4 to both sides of the inequality to isolate the absolute value expression: 3x+124+4<6+4|3x + \frac{1}{2}| - 4 + 4 < 6 + 4 3x+12<10|3x + \frac{1}{2}| < 10

Step 2: Remove the absolute value by considering two cases

The absolute value inequality A<B|A| < B implies two inequalities: 10<3x+12<10-10 < 3x + \frac{1}{2} < 10

Step 3: Solve the inequalities separately

For the left side of the inequality: 10<3x+12-10 < 3x + \frac{1}{2} Subtract 12\frac{1}{2} from both sides: 1012<3x-10 - \frac{1}{2} < 3x 20212<3x-\frac{20}{2} - \frac{1}{2} < 3x 212<3x-\frac{21}{2} < 3x Divide by 3: 216<x-\frac{21}{6} < x Simplify: 72<x-\frac{7}{2} < x or x>72x > -\frac{7}{2}

For the right side of the inequality: 3x+12<103x + \frac{1}{2} < 10 Subtract 12\frac{1}{2} from both sides: 3x<10123x < 10 - \frac{1}{2} 3x<202123x < \frac{20}{2} - \frac{1}{2} 3x<1923x < \frac{19}{2} Divide by 3: x<196x < \frac{19}{6}

Step 4: Combine the two results

The solution to the inequality is: 72<x<196-\frac{7}{2} < x < \frac{19}{6} In interval notation, this is: (72,196)\left( -\frac{7}{2}, \frac{19}{6} \right)

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Related Questions:

  1. How do you solve absolute value inequalities involving "greater than"?
  2. What is the difference between solving A<B|A| < B and A>B|A| > B?
  3. How can absolute value inequalities be represented on a number line?
  4. How do you verify solutions for absolute value inequalities?
  5. What are some common mistakes when solving absolute value inequalities?

Tip: When solving absolute value inequalities, always consider both the positive and negative scenarios to avoid missing part of the solution.

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Math Problem Analysis

Mathematical Concepts

Absolute Value Inequalities

Formulas

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Theorems

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Suitable Grade Level

High School