Math Problem Statement

Solve the inequality in terms of intervals and illustrate the solution set on the real number line. $ 2x + 7 > 3 $

Solution

We are tasked with solving the inequality:

2x+7>32x + 7 > 3

Step-by-Step Solution:

  1. Isolate xx: To solve for xx, we first subtract 7 from both sides:

    2x>372x > 3 - 7

    Simplifying the right-hand side:

    2x>42x > -4

  2. Solve for xx: Now, divide both sides by 2 to isolate xx:

    x>42x > \frac{-4}{2}

    Simplifying:

    x>2x > -2

Solution in Interval Notation:

The solution to the inequality x>2x > -2 can be written in interval notation as:

(2,)(-2, \infty)

Illustration on the Real Number Line:

  • Draw a real number line.
  • Mark a hollow circle at 2-2 (since x=2x = -2 is not included in the solution).
  • Shade the region to the right of 2-2, representing all values greater than 2-2.

Would you like the detailed steps for graphing, or do you have any questions? Here are some related questions you might explore:

  1. How do you solve inequalities with multiple steps?
  2. How do you handle inequalities that involve division by a negative number?
  3. What is the difference between strict and non-strict inequalities?
  4. How do you solve compound inequalities?
  5. How can absolute value inequalities be solved?

Tip: Always remember that when dividing or multiplying both sides of an inequality by a negative number, you must reverse the inequality sign.

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Math Problem Analysis

Mathematical Concepts

Algebra
Inequalities
Interval Notation
Real Number Line

Formulas

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Theorems

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Suitable Grade Level

Grades 7-9