Math Problem Statement

|x + 10| ≤ 3x - 2

Solution

The inequality provided is:

x+103x2|x + 10| \leq 3x - 2

To solve this inequality, we need to split it into two cases based on the properties of absolute values. The absolute value function can be rewritten as two separate inequalities:

Case 1: x+100x + 10 \geq 0 (i.e., x10x \geq -10)

In this case, the inequality becomes: x+103x2x + 10 \leq 3x - 2

Subtract xx from both sides: 102x210 \leq 2x - 2

Add 2 to both sides: 122x12 \leq 2x

Divide by 2: x6x \geq 6

Thus, for x10x \geq -10, the solution is x6x \geq 6.

Case 2: x+10<0x + 10 < 0 (i.e., x<10x < -10)

In this case, the absolute value inequality becomes: (x+10)3x2-(x + 10) \leq 3x - 2

Simplify: x103x2-x - 10 \leq 3x - 2

Add xx to both sides: 104x2-10 \leq 4x - 2

Add 2 to both sides: 84x-8 \leq 4x

Divide by 4: x2x \geq -2

However, we have a contradiction here because x<10x < -10 in this case, and x2x \geq -2 is not possible under the condition x<10x < -10. Therefore, there is no solution from this case.

Final Answer:

The solution to the inequality is x6x \geq 6.

Do you have any questions or would you like more details?


Here are 5 follow-up questions based on this inequality:

  1. What are the key properties of absolute values when solving inequalities?
  2. How do we approach cases where there is a contradiction, as seen in Case 2?
  3. How would the solution change if the inequality was x+10<3x2|x + 10| < 3x - 2 instead of \leq?
  4. What happens if we modify the inequality to x+103x2|x + 10| \geq 3x - 2?
  5. Can we solve this inequality graphically to verify the solution?

Tip: When solving absolute value inequalities, always check the conditions in both cases to avoid contradictions.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Inequalities

Formulas

|x + 10| ≤ 3x - 2
Breaking down absolute values into two cases
Solving linear inequalities

Theorems

Properties of Absolute Value Inequalities
Linear Inequality Rules

Suitable Grade Level

Grades 9-11