Math Problem Statement

Solve for x and graph the solution on the number line below: -12 < 3x - 6 and -3 ≥ 3x - 6.

Solution

Let's solve the system of inequalities and graph the solution on the number line.

The given system is:

  1. 12<3x6-12 < 3x - 6
  2. 33x6-3 \geq 3x - 6

Solving the first inequality:

12<3x6-12 < 3x - 6

Add 6 to both sides:

12+6<3x-12 + 6 < 3x

6<3x-6 < 3x

Now, divide both sides by 3:

2<x-2 < x

So, the first inequality is:

x>2x > -2

Solving the second inequality:

33x6-3 \geq 3x - 6

Add 6 to both sides:

3+63x-3 + 6 \geq 3x

33x3 \geq 3x

Now, divide both sides by 3:

1x1 \geq x

This simplifies to:

x1x \leq 1

Combined Solution:

Now, combine the two inequalities:

2<x1-2 < x \leq 1

This means xx is greater than 2-2 and less than or equal to 11. In inequality notation, this can be written as:

(2,1](-2, 1]

Graph on the Number Line:

  • An open circle at 2-2 because x>2x > -2 (not inclusive).
  • A closed circle at 11 because x1x \leq 1 (inclusive).
  • Shade the region between 2-2 and 11.

Do you have any further questions, or would you like additional details?

Here are some related questions:

  1. How do we interpret the open and closed circles on a number line?
  2. What is the difference between strict inequality and inequality with equality?
  3. How would this change if one inequality was reversed?
  4. Can we solve a similar inequality if it included fractions?
  5. What if the inequality had more than two conditions?

Tip: When solving inequalities, always remember to reverse the inequality sign when multiplying or dividing by a negative number.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Inequalities
Number Line

Formulas

Solving inequalities
Graphing inequalities on a number line

Theorems

Properties of Inequalities

Suitable Grade Level

Grades 7-9